DESCRIPTION OF PLATE VIII. 



Mastodon Andium. 



Fig. 1. Portion of left side of lower jaw of a young Mastodon Andium, 

 containing the second and third milk molars in situ, one-third of 

 the natural size, and copied from a drawing by Mr. Ford in 

 Plate XL., fig. 13 a, of the Fauna Antiqua Sivalensis. The 

 specimen is in the British Museum, and was obtained from 

 Buenos Ayres. (See page 99.) 



Fig. 2. Left half of lower jaw of an adolescent Mastodon Andium, con- 

 taining the first and second true molars, one-third of the natural 

 size, and copied from a drawing by Mr. Ford in Plate XL., 

 ■ fig. 15, of the F. A. S. The specimen belongs to the Canterbm-y 

 Museum, and was obtained from Chili. (See page 100.) 



Fig. 3. Perfect lower jaw of a nearly adult Mastodon Andium, con- 

 taining the second and third true molars in situ, one- third of 

 the natural size, and copied from a drawing by Mr. Ford in 

 Plate XXXV. of the F. A. S. The specimen is in the British 

 Museum, and was obtained from Buenos Ayres. (See page 100.) 



