1867.] DR. J. E. GRAY ON THE RHINOCEROTID^. 1009 



A. The forehead and the nose behind the base of the horn flat, both 

 in the living animal and skull. Eurhinoceros. 



* Upper jaw slightly contracted in front of the grinders. 

 1. Rhinoceros javanicus. Javan Rhinoceros. B.M. 



Skull broad ; forehead behind the horn broad, flat, or slightly 

 concave, obscurely keeled on the sides near base of horn ; intermaxil- 

 lary bone elongate, slender, straight, without any upper process ; 

 lachrymal bone roundish, nearly as wide as high ; nasal bones not 

 quite two-fifths of the entire length of the nose and crown. 



Rhinoceros javanicus, F. Cuv. et Geoff. Mam. Lith. ; Gray, Cat. 

 Mamm. B. M. ; Solom. Miiller, Verb. t. 33, c? ? . 



R. javanus, Blainv. Osteogr. t. 1 (skeleton), t. 2 (skull, adult and 

 jun.), t. 7 (teeth). 



R. sondaicus {R. unicorne de Java), Cuvier, Oss. Foss. ii. 33, 1. 14. 

 f. 2 (skull), t. 17, 18 (skeleton); Raffles, Trans. Linn. Soc. xiii. ; 

 Horsf. Zool. Java, t. (animal) ; Blyth, Journ. Asiat. Soc. Bengal, 

 xxxi. 1862, p. 151, t. 1. f. 2, 3, t. 2. f. 2, 3 (skull?). 



Hab. Java. Skull of type from Mus. Leyden. 



In the British Museum there are three skulls belonging to this 

 species : — 



1 . A skeleton of an adult animal with a skull, purchased from the 

 Leyden Museum, from Java. 



2. An adult skull, received from the Zoological Society. 



3. A skeleton with the skull of a half- grown animal, received from 

 the Leyden Museum through M. Franks as it', sumatranus, from 

 Sumatra. The skull agrees in all particulars, especially in the form 

 of the occiput and the concavity and breadth of the forehead and 

 nose, with the adult skull of R. javanicus from Java ; so that there 

 must have been some mistake in the name and habitat ; perhaps the 

 wrong skeleton was sent. 



There is also an adult skull which has had the nasal bone cut off 

 (722 h), which was received from the Zoological Society under the 

 name of R. unicornis; but I have little doubt it is a R. javanicus, 

 perhaps from Sir Stamford Raffles. 



In the oldest skull (723 c?) the aperture under the zygoma is 



3 inches 7 lines wide in the widest part and 4 inches 9 lines long. 

 In the adult skull 723 a, the aperture is 3 inches wide and 6 inches 

 1 line long. In the skull of the young specimen (723 e) the aper- 

 ture is 2 inches 2 lines wide and 4 inches 7 lines long. The greater 

 width is produced by the skull under the zygoma becoming so much 

 narrower as the animal becomes aged. In 723 d this part is only 



4 inches 7 lines, and in 723 a it is 5 inches 9 lines wide. 



In the Museum of the Royal College of Surgeons there areflve 

 skulls that appear to belong to this species, but one or two of them 

 are in a bad condition (uos. 2970 and 2971, the rest are not num- 

 bered). 



Camper, who paid great attention to this species of Rhinoceros, 

 in a letter to Pallas, printed in the ' Neue Nord. Beytrage ' (vii. 249), 



