43 



19952 a. The second right upper true molar, in a very much worn 



(Fig.) condition ; from Euenos Ayres. Figured by Falconer and 



Cautley in the ' Fauna Antiqua Sivalensis,' pi. xl. fig. 11, 



under the name of M . andium. Purchased, 1846. 



19952 b. The associated right and left third upper true molars, in 

 (Fig.) an early stage of wear ; from Buenos Ayres. The speci- 

 men of the left side (woodcut, fig. 10) is figured by Fal- 

 coner and Cautley, op. cit. pi. xl. fig. 12, as M. andium. 



Fig. 10. 



Mastodon humboldti.The third left upper true molar ; from the Pleistocene 

 of Buenos Ayres. f . The lower border of the figure is the inner border 

 of the specimen. 



Each tooth carries four ridges and a double hind talon ; 

 when more worn the double trefoils would be produced ; 

 cement is present. It agrees very closely with the speci- 

 men figured by P. Gervais in the ' Mammiferes Fossiles 

 de 1'Amerique meridionale,' pi. v. fig. 9 (1855). 



Purchased, 1846. 



6 (0. C.). The imperfect third right upper true molar, in a partially 

 (Fig.) worn condition ; from South America. Figured by Fal- 

 coner and Cautley, op. cit. pi. xl. fig. 10, as M. andium. 

 A large quantity of cement is present. 



Presented by the Earl of Shelburne, 1768. 



