Sort By:
  1. The batrachians and reptiles of the State of Indiana /
    By: Hay, Oliver Perry,
    Publication info: Indianapolis :Wm. B. Burford,1892.
    Holding Institution: Smithsonian Libraries
    View Book
  2. The batrachians and reptiles of the State of Indiana / by Oliver Perry Hay.
    By: Hay, Oliver Perry,
    Publication info: Indianapolis :Wm. B. Burford,1892.
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    View Book
  3. Bibliography and catalogue of the fossil vertebrata of North America,
    By: Hay, Oliver Perry,
    Publication info: Washington :Govt. Print. Off.,1902.
    Holding Institution: University of California Libraries (archive.org)
    View Book
  4. Descriptions of seven new species of turtles from the Tertiary of the United States. Bulletin of the AMNH ; v. 23, article 34.
    By: Hay, Oliver Perry,
    Publication info: 1907
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  5. Descriptions of two new genera (Echmatemys and Xenochelys) and two new species (Xenochelys formosa and Terrapene putnami) of fossil turtles. Bulletin of the AMNH ; v. 22, article 3.
    By: Hay, Oliver Perry,
    Publication info: 1906
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  6. The fossil turtles of North America,
    By: Hay, Oliver Perry,
    Publication info: Washington, D.C. :Pub. by the Carnegie Institution of Washington,1908.
    Holding Institution: University of California Libraries (archive.org)
    View Book
  7. The fossil turtles of North America,
    By: Hay, Oliver Perry,
    Publication info: Washington, D.C.,Pub. by the Carnegie Institution of Washington,1908.
    Holding Institution: Smithsonian Libraries
    View Book
  8. On a collection of Upper Cretaceous fishes from Mount Lebanon, Syria, with descriptions of four new genera and nineteen new species. Bulletin of the AMNH ; v. 19, article 10.
    By: American University of Beirut. - Day, Alfrid. - Hay, Oliver Perry,
    Publication info: 1903
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  9. On certain genera and species of North American Cretaceous actinopterous fishes. Bulletin of the AMNH ; v. 19, article 1
    By: Cope, E. D. (Edward Drinker), - Hay, Oliver Perry,
    Publication info: 1903
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  10. On certain portions of the skeleton of Protostega gigas
    By: Hay, Oliver Perry,
    Publication info: Chicago,1895
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book
  11. On some collections of fishes made in the Kankakee and Illinois Rivers
    By: Hay, Oliver Perry,
    Publication info: Chicago,1896
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book
  12. On the group of fossil turtles known as the Amphichelydia ; with, Remarks on the origin and relationships of the suborders, superfamilies, and families of testudines. Bulletin of the AMNH ; v. 21, article 9.
    By: Hay, Oliver Perry,
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  13. On the manner of locomotion of the dinosaurs, especially Diplodocus, with remarks on the origin of the birds,
    By: Hay, Oliver Perry,
    Publication info: Baltimore, Md. :Williams & Wilkins company,1910.
    Holding Institution: University of California Libraries (archive.org)
    View Book
  14. On the skeleton of Toxochelys latiremis
    By: Hay, Oliver Perry,
    Publication info: Chicago,1896
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book
  15. On the skull of a new trionychid, Conchochelys admirabilis, from the Puerco beds of New Mexico. Bulletin of the AMNH ; v. 21, article 21.
    By: Hay, Oliver Perry, - Wortman, Jacob Lawson.
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  16. On the structure and development of the vertebral column of Amia
    By: Hay, Oliver Perry,
    Publication info: Chicago,1895
    Holding Institution: University Library, University of Illinois Urbana Champaign
    View Book
  17. On two interesting genera of Eocene turtles, Chisternon Leidy and Anosteira Leidy. Bulletin of the AMNH ; v. 22, article 9.
    By: Hay, Oliver Perry,
    Publication info: 1906
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  18. The Pleistocene of North America and its vertebrated animals form the states east of the Mississippi River and form the Canadian provinces east of longitude 95 .
    By: Hay, Oliver Perry,
    Publication info: WashingtonCarnegie Institution of Washington1923
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    View Book
  19. The Pleistocene of the middle region of North America and its vertebrated animals /
    By: Hay, Oliver Perry,
    Publication info: Washington :The Carnegie institution of Washington,1924.
    Holding Institution: ASC - York University Libraries (archive.org)
    View Book
  20. The recognition of Pleistocene faunas,
    By: Hay, Oliver Perry,
    Publication info: Washington :Smithsonian Institution,1912.
    Holding Institution: University of California Libraries (archive.org)
    View Book
  21. A revision of the species of the family of fossil turtles called Toxochelyidae, with descriptions of two new species of Toxochelys and a new species of Porthochelys. Bulletin of the AMNH ; v. 21, article 10.
    By: Brown, Barnum. - Hay, Oliver Perry,
    Publication info: 1905
    Holding Institution: American Museum of Natural History Library
    View Book (External)
  1. Again on Pleistocene Man at Vero, Florida
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 18
    Date: 1928
    Page Range: 233--241
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  2. Camels of the fossil genus Camelops
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 46
    Issue: 2025
    Date: 1913
    Page Range: 267--277
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  3. Characteristic mammals of the early Pleistocene
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 18
    Date: 1928
    Page Range: 421--430
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  4. A collection of Pleistocene vertebrates from southwestern Texas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 68
    Issue: 2625
    Date: 1926
    Page Range: 1--18
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  5. A contribution to the knowledge of the extinct sirenian Desmostylus hesperus Marsh
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 49
    Issue: 2113
    Date: 1915
    Page Range: 381--397
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  6. A contribution to the knowledge of the fishes of Kansas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 10
    Issue: 624
    Date: 1887-07-02
    Page Range: 242--253
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  7. Contributions to the knowledge of the mammals of the Pleistocene of North America
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 48
    Issue: 2086
    Date: 1915
    Page Range: 515--575
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  8. Description of a new fossil sea cow from Florida, Metaxytherium floridanum
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 61
    Issue: 2438
    Date: 1922
    Page Range: 1--4
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  9. Description of a new species of Amblystoma (Amblystoma copeianum) from Indiana
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 8
    Issue: 512
    Date: 1885
    Page Range: 209--213
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  10. Description of a new species of extinct horse, Equus lambei, from the Pleistocene of Yukon Territory
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 53
    Date: 1917
    Page Range: 435--443
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  11. Description of a new species of mastodon, Gomphotherium elegans, from the Pleistocene of Kansas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 53
    Issue: 2198
    Date: 1917
    Page Range: 219--221
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  12. Description of some fossil vertebrates from the Upper Miocene of Texas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 37
    Date: 1924
    Page Range: 1--19
    Publication info: Washington,Biological Society of Washington
    View Article
  13. Description of two species of fossil turtles, Toxochelys stenopora and Christernon? interpositum, the latter hitherto unknown
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 36
    Issue: 1665
    Date: 1909
    Page Range: 191--196
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  14. Descriptions of eight new species of fossil turtles from west of the one hundredth meridian
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 38
    Issue: 1747
    Date: 1910
    Page Range: 307--326
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  15. Descriptions of five species of North American fossil turtles, four of which are new
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 35
    Issue: 1640
    Date: 1908
    Page Range: 161--169
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  16. Descriptions of some mammalian and fish remains from Florida of probably Pleistocene age
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 56
    Issue: 2291
    Date: 1919
    Page Range: 103--112
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  17. Descriptions of some Pleistocene vertebrates found in the United States
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 58
    Issue: 2328
    Date: 1920
    Page Range: 83--146
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  18. Descriptions of Some Vertebrates of the Carboniferous Age
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 39
    Issue: 161
    Date: 1900
    Page Range: 96--123
    Publication info: Philadelphia :American Philosophical Society
    View Article
  19. Descriptions of species of Pleistocene Vertebrata, types or specimens of most of which are preserved in the United States National Musum
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 59
    Issue: 2391
    Date: 1921
    Page Range: 599--642
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  20. Descriptions of two extinct mammals of the order Xenarthra from the Pleistocene of Texas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 51
    Issue: 2147
    Date: 1916
    Page Range: 107--123
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  21. Descriptions of two new species of tortoises from the Tertiary of the United States
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 22
    Issue: 1181
    Date: 1899
    Page Range: 21--24
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  22. Descriptions of Two Species of Extinct Tortoises, One New
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Academy of Natural Sciences of Philadelphia.
    Volume: 54
    Date: 1902
    Page Range: 383--388
    Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
    View Article
  23. The extinct bisons of North America, with description of one new species, Bison regius
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 46
    Issue: 2021
    Date: 1913
    Page Range: 161--200
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  24. A Fossil Specimen of the Alligator Snapper (Macrochelys Temminckii) from Texas
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 50
    Issue: 200
    Date: 1911
    Page Range: 452--455
    Publication info: Philadelphia :American Philosophical Society
    View Article
  25. Further consideration of the shell of Chelys and of the constitution of the armor of turtles in general
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 73
    Issue: 2724
    Date: 1928
    Page Range: 1--12
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  26. Further observations on some extinct elephants
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 35
    Date: 1922
    Page Range: 97--101
    Publication info: Washington,Biological Society of Washington
    View Article
  27. LXV.—On one little-known and one hitherto unknown species of Saurocephalus
    By: Hay, Oliver Perry,
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 3
    Series: 7
    Date: 1899
    Page Range: 480--487
    Publication info: London,Taylor and Francis, Ltd.
    View Article
  28. A new fossil stickleback fish from Nevada
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 32
    Issue: 1528
    Date: 1907
    Page Range: 271--273
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  29. Notes on a collection of fishes from Florida, with descriptions of new or little known species
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 8
    Issue: 537
    Date: 1885-10-26
    Page Range: 552--559
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  30. Notes on some fossil horses, with descriptions of four new species
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 44
    Issue: 1969
    Date: 1913
    Page Range: 569--594
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  31. Occurrence of Scott's gray fox in probably recent cave deposits in Kentucky
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 35
    Date: 1922
    Page Range: 53--54
    Publication info: Washington,Biological Society of Washington
    View Article
  32. On a collection of fishes from eastern Mississippi
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 3
    Issue: 179
    Date: 1881-02-23
    Page Range: 488--515
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  33. On an important specimen of Edestus; with description of a new species, Edestus mirus
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 42
    Issue: 1884
    Date: 1912
    Page Range: 31--38
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  34. On certain genera and species of carnivorous dinosaurs, with special reference to Ceratosaurus nasicornis Marsh
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 35
    Issue: 1648
    Date: 1908
    Page Range: 351--366
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  35. On the breeding habits, eggs, and young of certain snakes
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 909
    Date: 1892
    Page Range: 385--397
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  36. On the ejection of blood from the eyes of horned toads
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 907
    Date: 1892
    Page Range: 375--378
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  37. On the Existing Genera of the Trionychidæ
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.
    Volume: 42
    Issue: 174
    Date: 1903
    Page Range: 268--274
    Publication info: Philadelphia :American Philosophical Society
    View Article
  38. On the Finding of the Bones of the Great Auk (Plautus impennis) in Florida
    By: Hay, Oliver Perry,
    Type: Article
    In: The Auk.
    Volume: 19
    Date: 1902
    Page Range: 255--258
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
    View Article
  39. On the fossil Mammalia of the first interglacial stage of the Pleistocene of the United States
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 20
    Date: 1930
    Page Range: 501--509
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  40. On the nature of Edestus and related genera, with descriptions of one new genus and three new species
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 37
    Issue: 1699
    Date: 1909
    Page Range: 43--61
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  41. On the skull and the brain of Triceratops, with notes on the brain-cases of Iguanodon and Megalosaurus
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 36
    Issue: 1660
    Date: 1909
    Page Range: 95--108
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  42. On the status of privately issued papers on systematic zoology
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the Biological Society of Washington.
    Volume: 37
    Date: 1924
    Page Range: 109--112
    Publication info: Washington,Biological Society of Washington
    View Article
  43. On three existing species of sea turtles, one of them (Caretta remivaga) new
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 34
    Date: 1908
    Page Range: 183--198
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  44. The Red-Headed Woodpecker a Hoarder
    By: Hay, Oliver Perry,
    Type: Article
    In: The Auk.
    Volume: 4
    Date: 1887
    Page Range: 193--196
    Publication info: Washington, D.C. :American Ornithologists' Union, etc.,1884-
    View Article
  45. Remarks on Dr. George G. Simpson's work on the Pleistocene paleontology of Florida
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 20
    Date: 1930
    Page Range: 331--340
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  46. Review of Dr. Gunther Schlesinger's paper on Masto-dons
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 15
    Date: 1925
    Page Range: 381--387
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  47. A revision of the Pleistocene period in North America, based specially on glacial geology and vertebrate paleontology
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 15
    Date: 1925
    Page Range: 126--133
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article
  48. Some observations on the turtles of the genus Malaclemys
    By: Hay, Oliver Perry,
    Type: Article
    In: Proceedings of the United States National Museum.
    Volume: 15
    Issue: 908
    Date: 1892
    Page Range: 379--383
    Publication info: Washington :Smithsonian Institution Press, [etc.]
    View Article
  49. Two new Pleistocene mastodons
    By: Hay, Oliver Perry,
    Type: Article
    In: Journal of the Washington Academy of Sciences.
    Volume: 16
    Date: 1926
    Page Range: 35--41
    Publication info: Washington [etc.,Washington Academy of Sciences]
    View Article