OF THE SUMATRAN RHINOCEROS. 131 
Flower informs me that a specimen in the Museum at Brussels has 
also lost its lower incisors. The premaxillary bones are anchylosed 
to the maxillaries, a condition I have not found in any other 
specimen, and which is probably dependent on the loss of the lower 
cutting-teeth. 
Including the present one, I have seen eight skulls of Asiatic two- 
horned Rhinoceroses (Ceratorhinus)—four in the College of Surgeons’ 
Museum, two in the British Museum, and one at the Museum at 
Cambridge. The present specimen agrees very closely with that at 
the last-named place, and with No. 1461 a, adult, from Pegu, in the 
British Museum. It being that of an aged individual, comparison 
with most of the others referred to is more difficult, as they are Page 93. 
nearly all immature. The skeleton mounted at the College of 
Surgeons, No. 2933, obtained 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 pro- 
_portionately 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 :— 
a Zool. Soc. | No. 1461a,| No. 2933, = # 
R.C.g.| Specimen. | B. Mus R.C.8 : ail 
in. in. in. in in 
Length of skull from tip of 
nasals to middle of occipi- 
ORE CFUM. ope cd ccnicvesecs 23 21°875 21 °925 21°25 22 125 
Breadth across nasal bones| 5°25 6 375 _ 4°75 6°75 
0 eal of 2nd upper molar 
Wiis tanddnetaces 2 1-775 17 1°6 
Length of Ist upper molar 
seevas eubucaeese 1°75 15 1°375 1°35 
a cacy of 4th upper pre- 
:- molar at base........... 1°6 1°25 1°255 1-225 
The following is an account of the various features of the viscera 
that were observed in the Sumatran Rhinoceros. 
K 2 
eS re 
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