ADDITIONS AND COHBECTIONS. 377 



is in^cated by the longitudinal carina in the vertex of the Cape spe- 

 cies, there being no trace of such carina in either of my specimens. 



Untortunately the tympanic bones are wanting in both, and I 

 can teU yon nothing of them. But the zygomatic bone is preserved, 

 and IS ot the same form as that figured in Cnvier's work, figs. 1 and 

 d, but somewhat smaller than the latter figure. 



l^T'^VT^'^ cervical vertebrae are free, separate from each other, 

 and the body of every one has the epiphyses on each side, the specimen 

 being that of a young individual. But in the atlas and front side of 

 the axis these epiphyses do not exist. I send you drawings of the first 

 (fag. / 7), the second (fig. 78), the fourth (fig. 79), and the 8ixth(fig. 80) 



Kg. 80. 



Sixth cervical vertebra. 



vertebrae : the third exactly resembles the fourth ; and the fifth only 

 differs in a small opening in the lateral arc, indicated in my drawing 

 of the fourth, on the left side. The seventh has no inferior process 

 at all, but a much stronger superior one, of the same form. AU the 

 five vertebrae after the second are very thin, 2 inches in diameter, — 

 the third being the thinnest of all, and the following ones somewhat 

 thicker ; the seventh is 2^ inches in thickness. 



" Of costal or dorsal vertebrae we have fourteen, very well indicated 

 by the flattened ends of the transverse processes being united with 

 the ribs. The first of these dorsal vertebrae is very thin, 3 inches in 

 diameter ; and the second somewhat thicker, 3^ inches ; after these 

 the bodies are much stronger, from 6 to 8 inches in diameter. The 

 three first dorsal vertebrae have transverse processes more rounded, 

 and directed forward. After the third they are more flat and broad, 

 and directed transversely to the sides. After these fourteen vertebrae 

 foUow twelve others with thinner transverse processes, rounded and 



