809 



5195. The third dorsal vertebra. 



This differs from the second in a slight diminution in the transverse and increase in the 

 vertical extent of the centrum : the diapophysis and neural spine are somewhat thicker : the 

 anterior neural emargination is narrower. It differs from that of the Chimpanzee in the 

 minor length of the neural spine, the greater relative breadth of the centrum, the greater 

 length of the pedicles and concomitant expanse of the neural canal. The accessory tubercle 

 is less distinctly developed upon the diapophysis. 



5196. The fourth dorsal vertebra. 



The same general differences, in comparison with the Chimpanzee, are repeated in this ver- 

 tebra, with a greater development of the diapophysis upwards and an increased size of the 

 accessory tubercle. 



5197. The fifth dorsal vertebra. 



This differs from the preceding vertebra in a slight increase of the centrum and in the 

 length and backward inclination of the neural spine. 



5198. The sixth dorsal vertebra. 



51 99. The seventh dorsal vertebra. 



The progressive increase in the size of the centrum is greater, and the anterior and poste- 

 rior costal surfaces are less equal and less approximated than in the Chimpanzee. 



5200. The eighth dorsal vertebra. 



The neural spines of this and the preceding dorsal vertebrae are shorter than in the Chim- 

 panzee, are thicker transversely and less extended in the axis of the spine, especially at their 

 extremities, which are tuberous, not truncate as in the Chimpanzee. 



5201. The ninth dorsal vertebra. 



The centrum is relatively larger, and the accessory tubercle above the diapophysis is more 

 produced. 



5202. The tenth dorsal vertebra. 



This chiefly differs from the preceding in the absence of the posterior costal surface on 

 each side. 



5 L 



