482 DESCRIPTION OF A NEW GENUS AND NEW SPECIES 



teeth, which are four in number in each jaw, are acutely 

 mamillated, forming three transverse ranges of wedge-shaped 

 tubercles. The first is three inches in length ; the second 

 or last tooth three and a half; the deciduous teeth are much 

 smaller, the first measuring but half an inch, the second two 

 inches. The roots of all the teeth are short, as the greatest 

 depth of the lower jaw is but four inches. 



Of the other bones the vertebrae are about an inch and a 

 half long, and three inches in diameter ; the separate spinous 

 process is seven and a half inches; the entire rib is twenty 

 inches long, and its curvature four inches ; the greatest diam- 

 eter of the broken rib is an inch and a half. The humerus 

 is seventeen inches long, and three in diameter; radius 

 thirteen inches in length, one and a half in diameter ; the 

 ulna fourteen inches long, two and a half in diameter. The 

 digital phalanx is three inches long, and three in diameter ; 

 the tibia is fourteen and a half inches long, and three in di- 

 ameter. 



While engaged in the examination of the New York spe- 

 cimen, my friend, Mr Franklin Peale, manager of the Phi- 

 ladelphia Museum, informed me that he had seen a jaw bone 

 in the cabinet of the University of Virginia which must have 

 belonged to the same species. In consequence I immediate- 

 ly addressed a note to the Professor of Anatomy in that in- 

 stitution, R. Dunglison, M.D. requesting an accurate de- 

 scription of this bone. This gentleman, who is equally dis- 

 tinguished for zealous devotion to the cause of science and 

 polished urbanity of manners, favoured me with an imme- 

 diate and satisfactory answer, from which the following par- 

 ticulars are derived. 



In the collection examined by Professor Dunglison there 

 are two parts of lower jaws, most probably belonging to 

 the same species, though to individuals of different ages. 

 These have been clumsily joined, as if they had formed a 

 single jaw. The right side of the jaw is complete from the 

 angle to the apex of the chin, which is perfect, having about 

 three inches of the left side preserved. The lower jaw is 



