252 Dr. J. E. Gray on Ceratorhinus. 



t. xi. f. 1, a, b, is apparently a younger state of the same species. 

 A. simplex, p. 72, t. xi. f. 3, a, b, is Homalogyra atomus, Ph. — 

 J. G. J.] 



14. Ammonicerina mutabilis, p. 72, t. xii. f. A, B (a &extr&), = Sola- 

 rium fallaciosum, Tiberi, pullus. 



15. Protomedea elata, p. 74, t. xi. f. 5, a, b, c, = Embolus rostralis, 

 Souleyet. 



16. Protomedea ornata, p. 74, t. xi. f. 6, a, b, c, = Capulus hungaricus, 

 L., juv. 



XXXIII. — On the Black and Ashy -grey Double-homed 

 Asiatic Rhinoceroses (Ceratorhinus sumatrensis, C. niger, 

 and C. lasiotis). By Dr. J. E. Gray, F.R.S. &c. 



Since I described the skull of the black double-horned rhino- 

 ceros from Malacca as G. niger, and figured its skull, the third 

 part of the ' Proceedings of the Zoological Society ' for 1872 

 and the first part for 1873 have appeared, both containing ob- 

 servations on this animal. 



The Secretary to the Zoological Society describes and figures 

 the black rhinoceros from Malacca (P. Z. S. 1872, p. 790, 

 t. lxvii.) and figures the head in detail (p. 793. f. 4& 5). This 

 animal was purchased by the Museum when it died ; and its 

 skin and skeleton have been preserved ; and it was on its skull 

 that I established Ceratorhinus niger. 



Mr. Garrod (P. Z. S. 1873, p. 92) published a paper on the 

 visceral anatomy of the above animal, illustrated with several 

 interesting woodcuts. Mr. Bartlett (P. Z. S. 1873, p. 104, t. xi.) 

 gives an account of the birth of a young specimen, and a figure 

 of it when it was two days old, and some details of its feet and 

 tail. This specimen was born on board the ship at the Vic- 

 toria Docks, when its mother was being transferred ,from 

 a vessel that brought it from Singapore to send it to the 

 United States. The mother and young were both intensely 

 black. 



The Secretary of the Zoological Society, Mr. Garrod, and 

 Mr. Bartlett all call this black rhinoceros " R. sumatrensis, 

 Cuvier," though Mr. Bell distinctly says that the Sumatran rhi- 

 noceros he described, which is the type of the Sumatran 

 species, is " brownish ash." 



Mr. Garrod observes that the skull of the skeleton of the 

 aged animal of R. sumatrensis in the College of Surgeons, 

 brought by Raffles from Sumatra, differs materially in several 

 points from the skull of the black rhinoceros, and also that 

 another skull in the College of Surgeons, from Raffles, agrees 



