1 836.] of the Dddupur collection, 493 



not be obtained. It is comparatively less than in the existing species, 

 but the great breadth of the teeth compensates for this difference. 



Having detailed the essential differences and the points of resem- 

 blance observable in the fossil Indian rhinoceros when compared with 

 Cuvier's dimensions of the existing Indian rhinoceros; we must be 

 permitted to add, that additional measurements from skulls of the latter 

 species are requisite hefore anything certain can be pronounced as to 

 the amount of difference or correspondence between the two species. 

 We are induced to make this remark, in consequence of having been 

 favored with the examination of two craniums which presented consi- 

 derable variation of proportions when compared with Cuvier's and 

 with each other. 



It appears to us desirable, therefore, to ascertain the limits within 

 which individual variations range before any thing positive can be 

 asserted. The foregoing remarks will have shown a great general re- 

 semblance, accompanied by a departure of proportions in some corre- 

 sponding parts : the latter may be sufficient for the establishment of a 

 new species, — at least for the present, until more data are obtainable 

 whence to determine the bounds by which the individuals of one species 

 are limited in their variations ; for the sake of distinction, therefore, 

 and present convenience, at the same time keeping in view the type 

 to which it is a near approach, we have termed the species under con- 

 sideration the R. Indicus fossilis . 



Teeth. The remark has been already passed, that the greater num- 

 ber of fossils obtained from the Maginnud deposit are the remains of 

 young animals : with the rhinoceros this has been particulai'ly the 

 case. We accordingly find ourselves better able to illustrate the early 

 stage of dentition than that more advanced. 



Fig. 1, PI. XIX. represents the right half of an upper jaw, the left 

 half being in this instance omitted, as also in figs. 3 and 4, in order 

 that the series may be brought under the eye in one plate. Fig. 1 

 contains the four milk molars of the left maxillary ; the fourth being 

 but just cut is unworn ; but the palate being broken away from the 

 base of the tooth, more of it is seen than would otherwise be the case ; 

 in the right half of the specimen, where the palate is whole, the fourth 

 molar is more concealed. The first molar is also unworn, but the 

 second and third have suffered detrition. The two rows of teeth have 

 their internal base lines parallel to each other, and the lines which 

 would circumscribe their exterior much curved, in consequence of the 

 difference of breadth which exists amongst the teeth. The upper 

 part of an unworn tooth, measured exteriorly, is much longer than 

 the lower ; for the anterior of each molar projects beyond the posterior 



