DONS. — DU 28 AVRIL AU 16 JUIN 1890 73 



— 6*^1 annual report. 1886. 1887. 



s. G. Williams : Note on the Lower Helderberg rocks of Cayuga Lake, p. 10-12. — 

 S. G. Williams : On the TuUy limestone, p. 13-29, 1 pi. — J. M. Clarke : Annelid 

 teelh froni the lower portion of the Hamilton Group., p. 30-35, 1 pi. — James Hall : 

 Note on the occurrence of the Dictyospongidae in the State of New-York, p. 36-38, 

 1 carte. — Id. : Descriptions of Fenestellidae of the Hamilton group of New-York, 

 p. 41-70, 7 pi. 



— 39*11, 4ith^ 42d annual report of the trustées of the State 

 Muséum of natural History. 1885, 1887, 1888. 



Cambridge. — Memoirs of the Muséum of Comparative Zoôlogy 

 at Harvard Collège. 

 Vol. XVI, n° 3, nov. 1889. 



Alpheus Hyatt : Genesis of the Arietidae, 238 p. 14 pi. 



Bulletin of— . Vol XIX, nos 2, 3, 1890. 

 Vol. XVI, no 8, 1880. 



J. E. WoJfï : On some occurrences of Ottrelite and Ilmenite schist in New England, 

 p. 159-165. 



Harrisburg. — Geological Survey of Pennsylvania. Atlas Southern 

 Anthracite Field. Part. II, AA. 



— Atlas Eastern Middle Anthracite Field. Part III, AA. 



— Atlas North Anthracite Field. Part V, AA. 



New-Haven. — The American Journal of Science. 

 3<i ser. Vol. XXXIX, n" 233, mai. n° 234, juin 1890. 



G. F. Becker : Elementary proof of theEarth's Rigidity, p. 336-352. —G. H. Wil- 

 liams : On the Hornblende of S'-Lawrence County, p. 352-358. — Whitman Cross : 

 Note on some secondary minerais of the Amphibole and Pyroxene groups, p. 359-370. 

 — S. L. Penfield : On Spangolite, a new Copper-Mineral, p. 370-378. — James 

 D. Dana : Archaean axes of Eastern North America, p. 378-383. — Fr. J. H. Merrill : 

 On the metamorphic strata of Southeastei-n New-York, p. 383-392. — L. G. Eakins: 

 Meteoiic Iron from North Carolina, p. 395-396. — S. L. Penfield : Hamlinite, a 

 new rhombohedral Minerai from the Herderite locality atStoneham, p. 511-513. — 

 0. G. Marsh : Notice of New Tertiary Mammals, p. 523-525. 



New-York. — Transactions of the New-York Academy of Sciences. 

 Vol. IX, 1889-90, n°s 1, 2. 



0. p. Hubbard : Geological Notes, p. 3-4. — Daniel S. Martin : The origin of diagonal 

 trends in the earth's crust, with application to the production of folds and faults, 

 p. 15-21. — H. Carrington Bolton : Researches on sonoi'ous sand in the Peninsula of 

 Sinai, p. 21-25. — J. S. Newberry : The Laramie Group ; its geological relations, ils 

 économie importance, and its fauna and flora, p. 27-32. — J. J. Friedrich : OnProto- 

 zoôtites, Quaternary and Tertiary, from California, and on Protozoa as rock-building 

 agents, p. 32-36. — J. S. Newberry : The Rock Sait deposits of the Salina Group in 

 Western New-York, p. 39-45. — J. H. Merrill a. D. S. Martin : A Note on thecolored 

 clays recently exposed in railroad cuttings near Morrisania, N. Y, p. 43-46. 



