RHINOCEKOS. 161 



anterior and posterior transverse hillocks, is here less curved than that 

 of the Indian rhinoceros ; and there is wanting altogether the small 

 salient of enamel, which in the Indian rhinoceros occurs between the 

 starting point of the above-mentioned spur and the jDoint of junction 

 of the exterior and anterior main lines of enamel. It may also be 

 mentioned, that the exterior and posterior lines of enamel being less 

 thick than the corresponding parts of the sixth molar of the Indian 

 rhinoceros, there is a greater space between the two. Such modifica- 

 tions of form are however fortuitous, differences of equal amount being 

 observable in the teeth of animals of the same existing species. 



This fossil measures in length . . in. 2-50 mfet. 0-0645 

 in breadth . . „ 2-62 „ 0-0675 



Fig. 6. The 5th molar, derived from a left maxilla. The outline 

 of its enamel accords -wdth that of the similar tooth of the Indian rhino- 

 ceros, the only difference being in the dimensions and in the emamel- 

 lated edge of the short beading at the anterior side of the tooth. 



It measures in length .... in. 2-08 mfet. 0-053 

 „ in breadth ... „ 3-27 „ 0-0835 



Fig. 7 is the 7th molar, and from a right maxilla ; the point of the 

 small spur is broken, as also the anterior extremity of the external line 

 of enamel ; but the tooth is sufficiently perfect to show a close resem- 

 blance to the analogous molar of the Indian rhinoceros. 



It measures in length .... in. 2-88 met. 0-0735 

 in breadth 2-53 „ 0-065 



Fig. 8 is the 7th molar of a left maxilla. The difference observ- 

 able between this and the foregoing specimen consists in the great 

 development which the small anterior spur here attains. In the former, it 

 is scarcely observable ; in fig. 8 it is very prominent. Variations to an 

 equal amount may, however, be observed in the minor salients, &c., of 

 enamel in teeth appertaining to skulls of the same existing species. No 

 weight can therefore be attached to such unimportant modifications. 



This fossil measures in length . . in. 2-95 met. 0-075 

 ).. in breadth . . „ 2'55 „ 0-065 



The cranium PI. XV. has its molar teeth so much worn down that 

 the configurations of the enamel cannot be traced. The table of dimen- 

 sions gives the length and breadth of each tooth, and shows that although 

 the lengths do not materially differ from those of the corresponding 

 teeth of the existing species, the breadths exceed those of any hitherto 

 described. 



Without complete illustrations of the milk-teeth of existing species, 

 it would be dangerous to attempt a comparison between them and the 

 fossil Indian rhinoceros. We have therefore avoided the endeavour ; 

 but we must be allowed to notice the upper jaw fig. 4, PI. XIX., which 

 offers peculiarities when compared with figs. 1, 2, and 3 (of the same 

 plate), deserving of remark. 



The right half of the specimen is figured in the plate, the left half 

 having lost the first tooth. With respect to age, this jaw nearly cor- 

 responds with fig. 3, the fifth molar being in both on the point of 

 appearance. The following departures from the tracing of enamel in 

 figs. 1, 2, and 3, may, however, be observed. The second molar of 



VOL. I. M 



