XXIV. — On the Fossil Remains of two Neio Species of Mastodon, and 

 of other vertebrated Animals, found on the left Bank of the Irawadi. 



By WILLIAM CLIFT, Esq., F.G.S. F.R.S. &c. 



CONSERVATOR OF THE MUSEUM OF THE ROYAL COLLEGE OF SURGEONS. 



[Read April 18th, 1828.] 



In describing the fossil remains collected by Mr. Crawfurd during his mis- 

 sion to the Burman Empire, and which his liberality has placed in the Museum 

 of the Geological Society, I conceive that I shall best execute the task intrust- 

 ed to me, by a strict adherence to zoological and anatomical detail ; leaving 

 all geological inferences to Dr. Buckland, who has undertaken that depart- 

 ment, and who is so well qualified to do ample justice to it. 



But before I proceed to my descriptions, it is necessary to express my 

 great obligations to Mr. Broderip, the Secretary of this Society, for the very 

 valuable assistance which he has afforded me on several important points con- 

 nected with the subject. 



In the arrangement of the materials before me, the system of Cuvier is 

 followed, according to which I have first to treat of the 



PACHYDERMATA. 



Mastodon. 



Fossil species of this genus have already been found in America and in 

 Europe, and are so well known at the present day, that it would be super- 

 fluous to enumerate the various accounts which have been given of them. 

 But I cannot pass over the '^ Ossemens Fossiles " of M. Cuvier, who has 

 entered so luminously into the history of these extinct animals ; more espe- 

 cially as he has, after describing M. giganteum and M. angustidens, given 

 a chapter on certain teeth belonging to the genus Mastodon, which appear 

 to him to indicate the existence of species different from those two which he 

 had already recorded*. The teeth, according to the figures given, which come 



* Ossem. Foss. torn. i. p. 266. 

 VOL. II. — SECOND SERIES. 3 C 



