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 Frederick 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 Iridosmine 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 inhabiting 
North America ; Descriptions of new species of Reptiles from Oregon Territory ; 
Ona 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 Molluses 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 I]linois ; Hints towards 
a natural classification of the Family Histrini of Coleopterous Insects; Synopsis 
of the Parnide of the United States; Synopsis of the Eucnemide of temperate 
North America; On the difference 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 Anthicites 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- 
lida 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 new species; Synopsis of the Scydmenide 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- 
mide, (published in the Journal.) 
By Col. George A. McCall, U. 8. A. Description of a new species of Car- 
odacus. 
‘ 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 Phenixville, Pennsylvania; Chemical in- 
vestigation of the Mexican Honey Ant; Further examination of the Phenixville 
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 8S. 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. 
