186 



774. The metacarpal bone of the third or middle toe of the right fore-foot of 

 the Mastodon giganteus. 



From the tertiary formations of Ohio. Purchased. 



775- The metacarpal bone of the fifth or outermost toe of the left fore-foot 

 of the Mastodon giganteus ; it has formed part of the skeleton of a 

 much larger individual than the foregoing specimens, but, like them, is 

 chiefly remarkable for its great thickness in proportion to its length, as 

 compared with the Elephant : the proportions of the fore-foot being 

 broader and more massive in the Mastodon. 



From the tertiary formations of Ohio. Purchased. 



776. A considerable proportion of the right os innominaturn of a large Pro- 

 boscidian Pachyderm, probably the Mastodon giganteus. The acetabulum 

 differs from that of the Elephant in the comparative narrowness of the 

 notch leading to the Haversian depression, which is indicated by an 

 almost obsolete groove ; the branch of the pubis is also relatively thicker. 

 From the tertiary formations of Ohio. Purchased. 



777 ■ A considerable proportion of the right os innominaturn of a smaller or 

 younger Proboscidian Pachyderm ; in which the entry to the Haversian 

 depression is as wide as, and the depression itself somewhat deeper and 

 wider than, in the Elephant ; the pubis is relatively stronger. 

 From the tertiary deposits of the Ohio, North America. 



Purchased. 



778. The left os innominaturn of apparently the same individual Proboscidian, 

 showing the same characters of the acetabulum. 



From the tertiary deposits of the Ohio, North America. 



Purchased. 



77$- The left femur of the Mastodo?i giganteus. It is three feet in length, 

 and one foot two inches in circumference at the middle. It differs from 

 the femur of the Elephant and Mammoth in being shorter in proportion 

 to its breadth and thickness, and it is therefore a relatively stronger bone ; 

 it is likewise flatter on its posterior surface and the distal condyles are 

 more approximated. 



