124 ON THE FOSSIL CAMEL 



penultimate tooth having undergone this singular alteration and arrived at 

 this diseased form. 



In referring to the table of measurements above given, the excess in 

 size of the fossil is the most prominent feature, but the relative dimensions of 

 the different parts, with one exception, bear a close affinity to those of the 

 existing Camel. In the jaw of the latter there appears to be a greater 

 depth at the alveolus of the ultimate molar on the commencement of the 

 ascending branch, which may possibly result in some degree from age, and 

 the more perfect development of the teeth ; but in other respects the 

 resemblance is striking. The exception to which we refer is in the second 

 measurement, shewing the breadth between the rami or ascending branches 

 to the rear, a difference of some importance, as it involves in the structure 

 of the cranial portion of the skull an increase of width, and a greater distance 

 between the articulating or glenoid surfaces for the condyles of the lower 

 jaw. We are borne out in the correctness of this inference, by the remains 

 of our second species of Camel, which fortunately is very perfect in the 

 cranium, and where the breadth and form of this region in comparison 

 with that of the existing Camel are very different. To this, however, we 

 shall refer in its proper place, satisfying ourselves with the conclusion that 

 the Cmnelns Sivalensis and the Camelus Antiquus corresponded in this res- 

 pect, and that the former differed from the existing Camel in the form and 

 excess of width of the cranium. In comparing the teeth of the fossil 

 represented in Fig. 4, wdth those of the Camelus Dromedarius we observe 

 no difference excepting that which may have arisen from their difference 

 in age. That of the fossil must have been considerable, as may be observed 

 in the wear, and flattened surface of the fourth or pointed incisor. The 

 intermediate incisive teeth have been slightly disarranged in the matrix ; and 

 it will be observed in the drawing that one of these teeth has been displaced 

 and is now situated above, imbedded in the rock. The grinding surfaces of 

 all the incisors are much worn, and all marks of the lateral nick completely 

 obliterated. On the opposite side to that represented in the plate the canine 



