1. RHINOCEROS. 307 



723 c is nearly in the same state of dentition, as the seventh molar 

 is just appearing. This was purchased of a dealer, who said that 

 he received it direct from Borneo. The forehead, nose, and especially 

 the nasal bones are narrower than in the preceding. 



Those skulls, from their size, indicate a species about the size of 

 or rather smaller than B. unicornis. 



** Upper Jaw much contracted and very narrow in front of the yrinders. 



4. Rhinoceros Floweri. 



Skull : — the forehead and nose Hat above, the nose rounded on 

 the sides in front ; the nasal bones very slender, rather more than 

 two-fifths of the entire length of the nose and crown ; the zj-gomatic 

 arch convex, arched outwards, having a veiy large roundish cavity 

 for the temporal muscles ; lachrymal bone elongate, expanded on the 

 cheeks ;'tho upper jaw suddenly contracted and very narrow (only 

 2i inches wide) in front of the grinders ; the diastema very long, 

 longer than in the adult li. unicornis, being 2| inches long. 



Rliinoceros sumatrensis, Owen, Cat. Osteol. Prep. Mus. Coll. Sura. 



p. 500. no. 29.34. 

 Tennu, Raffles, Linn. Trans, xiii. p. 209. 

 Rhinoceros Floweri, Gray, P. Z. i>. 1807, p. 1015, figs. 3, 4. 



Ilah. Sumatra (liajles). Skull, Mus. Coll. Surgeons, no. 2934. 



A skull of this species is in the Museum of the Royal College of 

 Surgeons, described by Professor Owen, as above cited, who calls it 

 the cranium of a male Suniatran Ehinoceros (presented by Sir Stam- 

 ford Itaffles, P. Z. S.), observing that "the cranium offers no indica- 

 tion of the short hinder horn of this two-horned species." It is so 

 distinct in form and size that I have no doubt of its belonging to 

 a most distinct species. I propose to designate it after the energetic 

 Curator of the Museum of the College of Surgeons, who in the few 

 years that he has had charge of the collection has wonderfully im- 

 proved it and increased its usefulness, not only to the zoological stu- 

 dent, but for professional studies. 



The skidl is at once known fi'om all the others I have examined 

 by the convex prominent form of the zygomatics, and the contraction 

 of the front of the upper jaw behind the cutting-teeth. It indicates 

 a small species, not more than half the size of the common Indian 

 Ilhinoceros (It. unicornis). 



The skull no. 2934 is that of an adult animal with all its perma- 

 nent teeth. It was named M. sumatrensis by Professor Owen : but 

 it certainly is not a skull of that species ; for the occipital end of the 

 skidl is projected and the condyle produced, and, though the skull is 

 that of an adult animal, there is no mark of the root of the second 

 horn, wliich is always well marked in the adult skull of that sjjecics. 

 It is also distinguished from that species, as it is from li. unicornis 

 and II. Javanicus, by the convexity of the zygomatic arch and the 

 size of the cavity for the temporal muscles. 



It has been suggested that this skidl mav have belonged to an 



X 2 



