THIRTY-THIRD CONGRESS, 1853-55. 579 



Catalogue of the Described Coleoptera of the United States: By Fred- 

 erick Ernst Melsheimer, M. D. Kevised by S. S. Haldeman and J. L. Le 

 Conte. 



Synopsis of the Marine Invertebrata of Grand Manan, or the Region 

 about the mouth of the Bay of Fundy, New Brunswick : By W. Stimpson. 



Contributions to the Natural History of the Fresh Water Fishes of North 

 .America : By Qharles Girard. 



Anatomy of the Nervous System of Rana pipiens, L.: By Jeffries Wyman, 

 .M. D. 



Catalogue of North American Reptiles, in the museum of the Smithsonian 

 Institution. Part I. Serpents : By S. F. Baird and C. Girard. 



Botany. 



Plantae Wrightianse Texano-Neo Mexicans : By Asa Gray, M. D. Part 

 I pp. 146, and 10 plates. 



Plantse Wrightianse Texano-Neo Mexican*. Part II. An account of a 

 collection of plants, made by Charles Wright, in Western Texas, New 

 Mexico, and Sonora, in the years 1851 and 1852 : By Asa Gray, M. D. 

 pp. 120, and 4 plates. 



Nereis Boreali Americana, or Contributions to a History of the Marine 

 Algse of North America. Part I. Melanospermeae : By William Henry 

 Harvey, M. D., M. R. I. A.; pp. 152 and 12 colored plates. 



Nereis Boreali-Americana, or Contributions to a History of the Marine 

 Algse of North America. Part II. Rhodospermse : By William H. 

 .Harvey, M. D., M. R. I. A.; pp. 262, and 24 plates, colored. 



Plantae Fremontianse ; or descriptions of plants collected by Colonel J. 

 C. Fremont in California : By John Torrey, F. L. S. 1853 ; pp. 24, and 10 

 plates. 



Observations on the Bails Maritima of Linnaeus : By John Torrey, 

 F. L. S. 



On the Darlingtonia Calif ornica ; a new pitcher plant from Northern 

 California : By Jo^n Torrey, F. L. S. 



Palce.oniology . 



A Memoir on Mosasaurus, and the three allied new genera, Holcodus, 

 -Conosaurus, and Amphorosteus: By Robert W. Gibbes, M. D. 



Memoir upon the Extinct Species of Fossil Ox : By Joseph Leidy, M. D. 



The Ancient Fauna of Nebraska; or, a description of remains of extinct 

 Mammalia and Chelonia from the Mauvaises Torres of Nebraska : By 

 .Joseph Leidy, M. D.; pp. 124, and 25 plates. 



Bibliography. 



Bibliography of American Natural History, for the year 1851 : By 

 Charles Girard. 



Notices of Public Libraries in the United States : By Professor C. C. 

 Jewett. 



Directions for Collecting, Preserving, and Transporting Specimens of 

 Natural History. Prepared for the use of the Smithsonian Institution. 

 Two editions. 



These works are distributed gratuitously to most of the 

 incorporated colleges and libraries in the United States, and 

 to the leading literary institutions of other countries. They 

 are not copyrighted, and are sold by the trade at a low rate. 



It may be contended that researches and publications of 

 a character so purely scientific are not calculated directly to 

 diffuse knowledge among the great mass of mankind. 



This is, no doubt, to a certain extent, true, and I shall be 



