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Jan. 7th, 1868
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 1--1
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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A Monograph of the Alcidæ
By: Coues , Elliott
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 2--81
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Feb. 4th
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 85--86
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Descriptions of Some New Species of Diurnal Lepidoptera. Series III
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 87--91
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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March 10th
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 91--91
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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An examination of the Reptilia and Batrachia obtained by the Orton Expedition to Equador and the Upper Amazon, with notes on other species
By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 96--140
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Second supplement on some new Raniformia of the old World
By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 138--139
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notes on Some Singular Forms of Chinese Species of Unio
By: Lea, Isaac
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 145--146
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Variations in Epigæa repens
By: Meehan, Thomas
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 153--156
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Monœcism in Luzula campestris
By: Meehan, Thomas
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 156--156
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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June 9th
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 159--159
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Descriptions of Seven New Species of Unio from North Carolina
By: Lea, Isaac
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 160--161
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Indication of an Elotherium in California
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 177--177
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notice of Some Vertebrate Remains from the West Indian Islands
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 178--180
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notice of Some Extinct Cetaceans
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 196--197
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notice of American Species of Ptychodus
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 205--208
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Synopsis of the Extinct Batrachia of North America
By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 208--221
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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On Agaphelus, a Genus of Toothless Cetacea
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 221--227
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Oct. 20th
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 227--228
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notice of Some American Leeches
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 229--230
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Sixth Contribution to the Herpetology of Tropical America
By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 305--313
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Dec. 1st
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 313--314
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Dec. 22d
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 314--315
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notice of Some Remains of Extinct Insectivora from Dakota
By: Leidy, Joseph,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 315--316
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Observations on Reptiles of the old world
By: Cope, E. D. (Edward Drinker),
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 1868
Date: 1869
Page Range: 316--323
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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On the Seed Vessels of Forsythia
By: Meehan, Thomas
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 334--334
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Description of Seven New Species of American Birds from Various Localities, with a Note on Zonotrichia melanotis
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 359--430
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Notes on the Species of Agonoderus, Bradycellus and Stenolophus Inhabiting America North of Mexico
By: Le Conte, John Lawrence,
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 373--382
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Correspondence of the Academy for 1868
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 394--396
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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Donations to the Library, 1868
Type: Article
In: Proceedings of the Academy of Natural Sciences of Philadelphia.
Volume: 20
Date: 1868
Page Range: 400--419
Publication info: Philadelphia,Academy of Natural Sciences of Philadelphia
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