1869.] MR. G. BUSK ON FOSSIL REMAINS FROM BORNEO. 415 
or posterior is continuous throughout the entire height of the crown 
(see fig. 9, p. 416). 
Fig. 7. 
Fig. 8. 
Crown surface, PR. swmatranus. 
I consider, therefore, as regards the Sarawak teeth, that they 
belong to a species not distinguishable by its dental characters from 
R. sondaicus, and that that species formerly inhabited the country 
about Sarawak. 
Before concluding, I would mention that Mr. Wallace has been 
good enough to place in my hands two upper molars, and, strangely 
enough, the two upper second molars of the same individual, and in 
the most beautiful and perfect condition, which he procured in 
Sumatra, but which present indubitably all the characters of the 
