GEOLOGICAL SOCIETY. 



73 



Lyceum, which, without doubt, belonged to the Walrus; 

 the skull is remarkably hard and heavy — the tusks hav- 

 ing become almost agatized. On comparison with similar 

 portions of the T. rosmarus, of Linn., it displayed 

 strong specific affinity. 



Locality. Ac comae county, Virginia. 



Place in the Geological series. Atlantic tertiary? 

 along with the fossil bones of Cetacea. 



Capt. Beechy brought home with him from the north 

 west coast of America the fossil vertebrae of an unknown 

 extinct mammalia 5 on comparing the fossil casts of these 

 vertebrae with the amphibious tribe of Carnassiers in the 

 museum of the Garden of Plants, the fossil appeared re- 

 ferrible to one of this family. 



ORDER CETACEA. 

 Genus Manatus. 



The fossil ribs and vertebras of a large species of Ma- 

 natus, are contained in the cabinet of the Academy of 

 Natural Sciences of Philad. Viol. Journ. Acad. Nat. 

 Sciences of Philad. vol. iv. p. 32, " Notice of Plesio- 

 saurus &c. by R. Harlan, M. D. 



Locality. Eastern coast of the United States, At- 

 lantic Tertiary, Georgia, New Jersey, western shore of 

 Maryland &c. 



The cabinets of the Academy of Natural Sciences of 



Philadelphia and the Lyceum of Nat. Hist, of N. York 



contain ribs and vertebrae &c. of fossil whales, or 

 Vol. I— K 



