1873.] 



OF THE SUMATRAN RHINOCEROS. 



93 



with most of the others referred to is more difficult, as they are 

 nearly all immature. The skeleton mounted at the College of 

 Surgeons, No. 2933, ohtained by Sir S. Raffles from Sumatra, is 

 aged also ; but there are points in which it differs materially from 

 the present specimen. It is of slighter build, and the nasal bones 



are narrower. 



A much larger skull, not quite adult, in the Museum of the Col- 

 lege of Surgeons, No. 2935, stated to be that of a " male Sumatran 

 Rhinoceros," and presented by Sir S. Raffles, is evidently from a 

 larger animal, and agrees also with Ceratorhinus lasiotis in being 

 proportionally broader in the parietal regions. In this skull also the 

 posterior of the submental foramina is situated in front of the second 

 premolar; while in all the others (except No. 2936, R.C.S., which 

 is young, but peculiarly massive) it is situated, when present, behind 

 that tooth. 



Subjoined is a table giving a few of the measurements in the skulls 

 above referred to : — 



No. 



2933, 



H. C. S, 



Length of skull from tip ofj 

 nasals to middle of occipi-' 

 tal crest 23 



Breadth across nasal bones 5-25 



Length of 2nd upper molar 

 at base ' 2 



Length of 1st upper molar 

 at base 



Length of 4th upper pre- 

 molar at base 



1-75 



10 



Zool. Soc. 

 specimen. 



No. l-161n, 

 B. Mus. 



No. 2933, 

 K. C. 8. 



21-875 

 6375 



1-775 



1-5 



1-25 



in. 



21-925 



1-7 



1-375 



1-255 



21-25 

 4-75 



1-6 



1-35 



1-225 



Cam- 

 bridge 

 speci- 

 men. 



22125 

 6-75 



The following is an account of the various features of the viscera 

 that were observed in the Sumatran Rhinoceros. 



Alimentary Canal. — The palate, which is covered with a smooth 

 epithelium, is marked by conspicuous transverse angular ridges. 

 There are eleven of these on each side ; and they are not continuous 

 anteriorly across the middle line, but the prominences of one side are 

 carried on as the fossae on the other. The posterior ridges are 

 continuous from one side to the other ; and they, instead of being 

 transverse as are those in front, are arranged in the form of a V, 

 the concavity of the V being directed forwards. On the soft palate, 

 which is 4| inches long, these ridges disappear. The palate is narrow, 

 as can be readily seen by an inspection of the skull ; anteriorly its 

 breadth is 2-f inches, and posteriorly 3£ inches, gradually increasing 

 from before backwards. 



In no part of the alimentary canal, except on the surface of the 

 tongue, were there any papillae visible to the naked eye. 



The cheeks form pads on either side composed of areolar and 

 muscular tissue, which project into the cavity of the mouth. These 



