134—30 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
NOTE. 
A small collection of fossils from Perim Island has lately come into the writer’s 
hands, among which are some teeth of Mastodon pandionis and M. pcriinmsis^ promising 
to he of considerable interest. They appear to show that the former (although 
apparently provided with premolars) exhibits signs of affinity with the Pikermi M. 
peiitelici] and also that it is not improbable that the tetralophodont M. perhnendB may 
have been a branch from the trilophodont stock of M. pandionis. There are already 
signs of the connection of the tetro-pentalophodont 31. sivalensis with the same 
original stock. 
The writer hopes to describe these specimens, and their bearing on the mutual 
relations of the Siwalik mastodons, in a later part ; and in the meantime is extremely 
anxious to obtain any additional specimens of the teeth and jaws of the mastodons 
of Sind and Perim Island. 
