DESCRIPTION OF PLATE IX. 



Mastodon Sivalensis and Mastodon Perimensis. 



Figs. 1 and 2. Show in plan and profile the last upper molar of Mastodon 

 Sivalensis, one-third of the natural size, and copied from draw- 

 ings by Mr. Ford in Plate XXXVI., figs. 6 and 6 a., of the 

 Fauna Antiqua Sivalensis. The tooth has six ridges and a hind 

 talon and shows well the alternate disjjosition of the crown- 

 mammillae. There is a cast of the specimen in the British 

 Museum. (See pages 117 & 467, and vol. i. p. 29.) 



Figs. 3 and 4. Show in plan and profile the antepenultimate molar of the 

 upper jaw, left side, of Mastodon Perimensis, one-half of the 

 natural size. The specimen was obtained from Perim Island, 

 and is in the Museum of the Asiatic Society of Bengal. The 

 figure is copied from a pencil drawing executed by Mr. Claude 

 Augier for Dr. Falconer, in 1856, and the identification of the 

 tooth is in Dr. Falconer's handwriting upon the drawing. (See 

 page 122.) 



Figs. 5 and 6. Show in plan and profile the penultimate upper molar, 

 right side, of Mastodon Perimensis, one-half of the natural size. 

 The specimen, like the last, was obtained from Perim Island, 

 was identified by Dr. Falconer, and is in the Museum of the 

 Asiatic Society of Bengal. The figure is copied from a drawing 

 by Mr. Claude Augier. (See page 122.) 



