1852.] 215 



By James C. Fisher, M. D. On the Aurora of February 19th, 1852. 



By Henry A. Ford, M. D. Characteristics of the Troglodytes gorilla. 



By Fiederick A. Genth, Ph. D., four, to wit : On some Minerals which accom- 

 pany gold in California ; On Strontiano-Calcite, a new Mineral ; On Rodophyllite, 

 a new Mineral ; On a probably new Element with Irido.smine and Platinum, 

 from California. 



By Mr. Charles Girard. Additions to a former paper on the North American 

 Astaci. 



By Edward Hallowell, M. D., five, to wit: Descriptions of new species of 

 Reptiles from Western Africa ; Descriptions of new species of Reptiles inhabit- 

 ing North America ; Descriptions of new species of Reptiles from Oregon Ter- 

 ritory ; On a new genus and three new species of Reptiles, inhabiting North 

 America; On a new genus and two new species of African Serpents. 



By Adolphus L. Heermann, M. D. : Notes on the birds of California, (published 

 in the Journal.) 



By P. R. Hoy, M. D. Descriptions of two species of Owls, presumed to be 

 new, inhabiting the State of Wisconsin during the winter season. 



By the Rev. Lorenzo L. Langstroth. On the Impregnation of the eggs of the 

 Queen Bee. 



By Mr. Isaac Lea, four, to wit : Description of a new species of Symphynote 

 Unio ; Description of a Fossil Saurian of the new Red Sandstone of Pennsyl- 

 vania, with some account of the formation ; On some new Fossil Molluscs in the 

 Carboniferous slates of the Anthracite seams of the Wilkesbarre Coal Forma- 

 tion ; Description of a new species of Eschara from the Eocene of Alabama. 



By John L. Le Conte, M. D., fifteen, to wit: Notice of Fossil Dicotyles from 

 Missouri ; Notes on some Fossil Suiline Pachyderms from Illinois ; Hints towards 

 a natural classification of the Family Histrini of Coleopterous Insects ; Synopsis 

 of the Parnidae of the United States ; Synopsis of the Eucnemidae of temperate 

 North America ; On the diflFerence between Primordial Races and Introduced 

 Races ; Remarks on some Coleopterous Insects collected by S. W. Woodhouse, 

 M. D., in Arkansas and New Mexico ; Synopsis of the Anthracites of the United 

 States ; Synopsis of the species of Pterosticus Bon. and allied genera, inhabiting 

 temperate North America, (published in the Journal.) Remarks on the Coccinel- 

 lidae of the United States ; Description of a new species of Trombidium ; Descrip- 

 tion of a new species of Sciurus ; Catalogue of the Melyrides of the United 

 States, with descriptions of a new species ; Synopsis of the Scydmenidae of the 

 United States ; An attempt at a synopsis of the genus Geomys, Raf. 



By Joseph Leidy, M. D. On the Osteology of the Head of the Hippopotamus, 

 with a description of the Osteological Characters of a new Genus of Hippopota- 

 midse, (published in the Journal.) 



By Col. George A. McCall, U. S. A. Description of a new species of Car- 

 podacus. 



By David Dale Owen, M. D. Notice of a Mineral from California, probably 

 new. 



By Mr. M. Tuomey. Description of some Fossil shells from the Tertiary of 

 the Southern States. 



By Charles M. Wetherill, Ph, D., five, to wit : Examination of the Molybdate 

 of Lead from the Wheatley Mine, near Phoenixville, Pennsylvania ; Chemical in- 

 vestigation of the Mexican Honey Ant; Further examination of the Phoenixville 

 Molybdate of Lead; Chemical examination of the Food of the Queen Bee; An- 

 alysis of the Cotton Plant and Seed, &c., by the late Thomas J. Summer, with 

 additions, by Charles M. Wetherill. 



By S. W. Woodhouse, M. D., six, to wit : Descriptions of new species of Birds 

 of the Genera Vireo, Vieill., and Zonotrichia, Swainson; Description of a 

 new species of Ectopistes ; Description of a new species of Sciurus ; Descrip- 

 tion of a new species of Numenius; Descriptions of two new species of pouched 

 Rats ; Description of a new species of Struthus. 



In all sixty-two papers. 



