88 



crocodiles, contemporaries of the Colossochelys in the Sewalik fauna, 

 have survived; 2nd, from the indications of mythology in regard to 

 a gigantic species of tortoise in India. 



" Some of the bones were analysed with great care by Mr. Mid- 

 dletou, and yielded a large proportion of fluorine, the constituents 

 being, — 



Phosphate of lime 64*95 



Carbonate of lime 22*36 



Fluoride of calcium 11*68 



Oxide of iron 1*00 



A trace of chloride of soda. 



99-99 

 " Other Sevvalik fossil bones were at the šame time subjected to 

 analysis, such as the Mastodon elephantoides, Camelus sivalensis, Horse, 

 Ruminants, &c., and the whole of them yielded similar results, \vith 

 a proportion of fluoride of calcium varying from 9 to 11 per cent. 

 This is much above the usual ąuantity found in fossil bones ; the 

 utmost that has been met with having been in bones of the Anoplo- 

 therium from the Paris basin, 14 per cent." 



