160 [Feb. 



Four very fine specimens of a fossil Ostrea from California. Deposited by 

 Prof. Frazer. 



Cranium of a Dijak woman of Borneo, received from Mr. W. A. Gliddon by 

 Dr. Morton, and deposited by the latter. 



F'\)ruary \\th. 



Six fragments, and three casts of Dipleura pomalonotus, six specimens of Pleu- 

 rotomaria, three of Loxonema,and three Silurian fossil shells, from the Hamilton 

 Group, Cazenovia, N. Y. ; Goniatites, Onondasa Co., N. Y. ; three specimens of 

 Atrypa prisca and three of A. culioides, from Madison Co., N. Y. Presented by 

 Mr. Ledyard Linklaen. 



PhalaBna odora, Lin. from the vicinity of Philadelphia, (a rare species in this 

 locality). From Mr. John Mcllvaine, of Blockley. 



Shark's tooth from the Marl of New Jersey. From Mr. Powel. 



February ISth. 



Very fine specimen of Exogyra costata. From Mr. Harback, through Dr. 

 Spackman. 



Skins of Albatross, giant Petrel, Cape Pigeons, Owl; and seeds of Cherimoya 

 and Mango. Presented by Dr. G. R. B. Horner, U. S. N. 



Antlers of Cervus virginianus. From Mr. T. Fisher. 



Spongia ; from the Atlantic Ocean. From Mr. Wood. 



Calcareous Tufa, from Mr. Teublin, of Hlinois. 



Siliceous oxide of Zinc, from Lehigh Co., Pennsylvania. From Mr. John Cooke. 



Naucrates Echireis, in spirits. From Dr. T. C. Dunn, of Newport, R. I. 

 through Dr. Morton. 



DONATIONS TO LIBRARY 



In January and February, 1851. 

 January 1th. 



Proceedings of the American Philosophical Society, vol. 5, No. 45, April to 

 December, 1850. From the Society. 



Catalogue of the Marginellidae in the collection of John H. Redfield, January 

 1, 1851. From the author. 



Contributions to Helminthology. By Joseph Leidy, M. D. From the author. 



Letter to the Rev. Dr. Bachman,on the question of Hybridity in animals, con- 

 sidered in reference to the question of the Unity of the Human Race. By S. G. 

 Morton, M. D. From the author. 



Additional observations on hybridity in animals, and on some collateral sub- 

 jects : being a reply to the objections of the Rev. John Bachman, D. D. By S. G. 

 Morton, M. D. From the author. 



Notes on Hybridity, designed as a supplement to the Memoir on that subject. 

 ]By S. G. Morton, M. D. From the author. 



Annales des Mines. 4me. serie, tome 17, liv. 3 de 1850. From I'Ecole des 

 Mines. 



Bibliotheca Botanica, sive catalogus auctorum et librorum omnium qui de re 

 "botanica, de re rustica, &c. &c., tractant. A Joanne F. Seguierio Nemansense 

 digessus. 4to. 1740. From Mr. George Ord. 



Fourth Annual Report of the Regents of the Smithsonian Institution. From 

 the Institution. 



The following were presented by Mr. Edward Wilson, of Pembrokeshire, 

 Wales, on the usual condition: 



Outlines of Human Osteology. By F. O. Ward. 16mo. 



Jocko : episode detache des lettres inedites sur I'instinct des animaux. Par 

 Charles Pougens. 3d ed. 12mo. 



