522 



aperture of the nostrils. There is a large interparietal, and the upper half of the superocci- 

 pital appears to be detached from the rest. The lacrymal canal commences by two foramina, 

 which are defended by a process. The maxillary forms the floor of the orbit, as in the 

 Rhinoceros and Tapir : but the premaxillaries join the nasals. 



3093. The lower jaw. 



It is remarkable for the expanse of the ascending ramus. The coronoid process is per- 

 forated lengthwise at its base. The three divisions of the crown of the lower incisors have 

 been worn down to their common base. 



3094. The atlas. 



The transverse process is perforated vertically at its fore part by the vertebral artery, which 

 afterwards perforates the neural arch. The hypapophysis. developes a short process. 



3095. The dentata. 



The simple transverse process is perforated at its base for the vertebral artery, and the 

 neural arch is perforated on each side by the second cervical nerve. 



3096. The five other cervical vertebrae. 



The pleurapophysial part of the transverse process is much expanded in the third to the 

 sixth inclusive : it is wanting on the left side of the seventh vertebra, but is present as a 

 distinct element, or rudimental cervical rib, on the right side, where it completes the foramen 

 for the vertebral artery. 



3097. The twenty-two dorsal vertebrae. 



The spines incline towards the thirteenth, which is vertical, and indicates the centre of 

 motion of that part of the trunk. In their forms and proportions the spines resemble those 

 of the Rhinoceros. Seven pairs of ribs directly join the sternum, which consists of six bones. 

 The metapophysis commences on the third dorsal, and attains the outside of the zygapophysis 

 on the fifteenth : it exceeds the diapophysis in length in all the posterior dorsals. 



3098. The eight lumbar vertebrae. 



In these the diapophyses suddenly acquire great breadth, and gradually increase in length 

 to the last lumbar : the metapophyses are continued throughout the series. No anapophyses 

 are developed. 



