4Z 



nearly a regular portion of a circle without 

 any angles. In the Mammoth, what is called 

 the semi-lunar notch from the condyloid to the 

 coronoid processes, is very strongly marked 5 

 but in the Elephant no such notch exists. 

 In the xMammoth the bone from E. to a. is 

 extremely thin and rugged -, in the Elephant 

 It IS smooth, and being semi-cylindrical (as 

 well as circular) is unusually bulky, and well 

 adapted to the peculiar formation of the Ele- 

 phant's teeth. In the Elephant the under jaw 

 terminates in a grooved point, directed down- 

 wards(D.); the corresponding part in the Mam- 

 moth has a most extraordinary roughness, com- 

 posed of foliated or thin irregularly involuted 

 processes, indicating some unusual and im- 

 mense appendage. — This part, in some degree, 

 resembles the Walrus. And lastly, in the 

 under jaw of the Elephant, the opposite grind- 

 ers, which in the back of the jaw are very distant 

 from each other, approach towards an open in 

 the front; whereas in the Mammoth they are 

 completely parallel with each other. These va- 

 riations produce a very different outline in the 

 opening between the teeth, as you look at the 

 jaws in front: in the Mammoth, it is a portion 



