1862.] A Memoir on the living Asiatic Species of Rhinoceros. ]55 



dyle of the lower jaw (proportionally) much more elevated ; impart- 

 ing a conspicuously greater altitude to the vertex when the lower 

 jaw is in situ. Both species would appear to exhibit precisely the 

 same amount of variation. On present evidence (which, however, I 

 suspect to he fallacious), it would seem that the broader type of 

 sondaicus prevails in Bengal, and perhaps the narrower far south- 

 ward ; but we have both from the Tenasserim provinces ; and they 

 completely grade into each other, as equally in the analogous in- 

 stances of indicus and sumateanus. 



In illustration of the skulls, I cite the figures of Cuvier and de 

 Blainville (Oss. Foss., Atlas, pi. 42, f. J, pi. 160, f. 1, — Osteogra- 

 phie, JZhinoceros, pi. 2), as exemplifying the broad-faced type of 

 Rh. iNDicus ; and a very similar skull is that upon the skeleton of a 

 female in the museum of the Calcutta Medical College. This female 

 is one of a pair that lived about 45 years in captivity in Barrackpore 

 park. I have repeatedly seen' the pair when alive, many years ago ; 

 and remarked that they shewed no secondary sexual diversity, being 

 exactly of the same size and general appearance. They never bred ; 

 and I have been informed that a pair of Tapirs similarly kept, for 

 many years,in Batavia,shewed no disposition to propagate their species. 

 They should, of course, have been separated for a time now and then, 

 and again put together. "We learn, from this Calcutta Medical Col- 

 lege specimen and others, that the two forms of skull presented by 

 the Asiatic species of Rhinoceros are not indicative of sex, as might 

 probably have been suspected. 



I now figure (pi. I, fig. 1, and pi. II, fig. 1,) a very fine example of 

 the narrow type of skull of Rhinoceros indictts ; a splendid adult 

 male, with its horn. Let this be compared and contrasted with the 

 figures of the broad-faced type of skull published by Cuvier and de 

 Blainville. The skull now represented belongs to Capt. Fortescue, of 

 the late 73rd Regiment of Bengal Native Infantry ; who killed the 

 animal on the Butan side of the river Tista, not far from Jalpigari. He 

 has taken it to England. Two specimens in the Calcutta Medical 

 College museum are very similar ; a third is intermediate, though 

 decidedly rather broad than otherwise ; and a fourth (that already 

 noticed, with complete skeleton, female, as before specified,) very 

 closely approximates — even to minute details — the superb broad skull 

 figured by the eminent French zoologists. Five examples, in all, under 



