— Yol. II. Part. III. Number II Birds of Wertern and North Wertern Mé- 

 xico, by George N. Lawrence. Boston, 1871. Un cuaderno id. 



— Yol. II Part. III. Number III. Recents Changes of level and the Coast of 

 Maine. With reference to their origin and relation to other similar chan- 

 ges, by N. S. Shaler. Boston, 1874. Un cuaderno id. 



— Vol. II. Part. III. Number Y. Antiquity of the Caverns an Cavern life of 

 the Ohio Valley, by N. S. Shaler. Boston, 1875. Un cuaderno id. 



— Yol. II. Part. IV. Number I. Prodrome a Monograph. of the Tabanidse, of 

 the U S. by C. R. osten Sacken. Boston, 1875. Un cuaderno id. 



— Proceedings of the Boston Society of Natural History. Vol. xv-xvi-xvii. 

 Boston 1872-74-75. (Del último solo la 1* y 2* parte). 3 vol. en 4? 



— vDepartement of the interior. Bulletin of the United States. Geological and 

 Geographical Surney of the Territories. N. 2, "Washington, 1874. Un cua- 

 derno en 4? 



— U. S. Geolog. and Geograph. Survey of the Territ. F. V. Hayden. Geologist 

 in Charge. Miscellaneous Publications. N. J. List of Elevations Principa- 

 lly in that portion of the U. S. West of Missisipi River. Third edition. 

 "Washington, 1875. Un cuaderno en 4? 



— Sinopsis of the flora of Colorado by T. C. Porter and J. M. Coulter. Wads- 

 hington, 1874. Un cuaderno en 4? 



— Birds of the North West and a Hand Book of the ornitology of the Región 

 Drained by the Missouri River and its Tributaries, by Elliot Coues. "Was- 

 hington, 1875. Un vol. en 4? 



— Catalogue of the Publications of the United States Geological Survey of the 

 Territories, by F. V. Hayden Geologist in Charge. Washington, 1874. 

 Un cuaderno en 4? 



— Reportofthe U. S Geological Survey of the Territories. F. V, Hayden 

 Geologist in Charge. Vol. I Fossil Vertebratss, by Prof. Joseph Leidy. 

 Washington, 1873. Un vol. en folio. 



— Vol II. Cretoceous Vertébrala, by E. D. Cope. Washington, 1875. Un vol. 

 en folio. 



— Yol. X Monograph of the Geometrid Msths, by A. S. Packard Washington, . 

 1876. Un vol. en folio. 



Smithsonian Contributions to knowledge. Vol. XIX, XX, XXI. "Washington, 

 1874—76. 3 vol. en folio. 



— Transactions of the Connecticut Academy of Arts and Sciences. Vol. II, Part. 

 2 and Vol. III. Part. 1. New Haven, 1873—76. Dos, vol. en 4? 



— Second Geological Survey of Pennsylvania. Preliminary Report on the Mi- 

 neralogy of Pensylvania, by F. A. Genth. Harrisburg, 1875. Un vol. en 4 o 



(Continuaré.) 



