OF THE SIVALIK HILLS. 



127 



pancies that appear even amongst animals of the same species, in the length 

 and dimensions of this process. 



The length and breadth of the coronoid process appear to be distin- 

 guishing features in all animals where there is a great depth of the temporal 

 fossa and great elevation of the zygomatic arch ; and also in those animals 

 possessing the power of great lateral motion of the condyle in the glenoid 

 cavity. Amongst the former may be included all the Carnivora and predatory 

 animals : amongst the latter the Ruminantia, to which only we shall at 

 present refer, although there appears to be considerable obscurity on the 

 changes that modification of form of this process entails upon the physical 

 economy of the animal. 



The Capridae, including Antelopes, appear to have the coronoid process 

 more developed than the Bos ; the Bos more than the Camel. We observe 

 that this process in the common Goat, C. Hircus, is long and broad, and 

 in the A. Chikarralong but narrow, in the Te^racorms it is short. In 

 two specimens of the male and the female of the Nilgai {A. Picta, Pallas), 

 we observe that the female has exceedingly a long coronoid process, 

 much curved to the rear ; whereas that of the male is short, straight and 

 pointed. We could give additional instances were it necessary for a 

 want of any rule of uniformity, in fact the inferences of the value of 

 this process in establishing any peculiarity in the organization of the mas- 

 ticatory faculties, appear to us, as we before noted, to be clothed in consi- 

 derable obscurity. 



With these remarks on the osteology of the head, we will after the 

 following Table, shewing the comparative sizes of the ultimate tooth in the 

 upper jaw of a number of fossils compared with that of the Camel now 

 existing, proceed to the rest of the bony structure, which, from the strong 

 resemblance that exists between the fossil and modern types, will occupy 

 but a small space. 



