go, DESCRIPTION OF THE SIVATHERIUM, 



a broad base to a sharp point ; and the vertical height of their most con* 

 vex part above the brow at their base, is 3^ inches. 



The form of the maxillaries is strongly marked in two respects : 

 1st, their shortness compared with their great width and depth : 2d, in the 

 upward direction of the line of alveoli from the last molar forwards, giving 

 the appearance (with the licence of language intended to convey an idea 

 of resemblance without implying more) as if the face had been pushed 

 upwards to correspond with the rise in the nasals ; or fixed on at an angle 

 with the base of the cranium. The tendency to shortness of the jaw was 

 observed in the dimensions of the teeth, the molars being compressed, and 

 their width exceeding their length to an extent not usual in the Ruminan- 

 tia. The v»^idth apart, between the maxillaries, was noticed before ; the 

 interval, between the outer surfaces of the alveoli, equalling the space in 

 length occupied by the line of molars. The cheek tuberosities are very 

 large and prominent, their diameter at the base being 2 inches and the 

 width of the jaw over them being 12.2 inches, whereas at the alveoli it is 

 but 9.8 inches. They are situated over the third and fourth molars ; and 

 proceeding up from them towards the malar, there is an indistinct ridge on 

 the bone. The infra-orbitary foramen is of large size, its vertical diameter 

 being 1.2 inch ; it is placed over the first molar as in the ox and deer tribe. 

 The muzzle portion of the bone is broken off at about 2.8 inches from the 

 1st molar, from the alveolar margin of which, to the surface of tlie diastema, 

 there is an abrupt sink of 1.7 inch. The muzzle is here contracted to 5.8 

 inches, and forwards at the truncated part to about 4.1. The palatine arch 

 is convex from rear to front, and concave across. No trace of the palatine 

 foramina remains, nor of the suture with the proper palatine bones. The 

 sphceno-palatine apophyses and all back to the foramen magnum* are 



* With the exception of a portion of tlie basilary region, which I'esembles that of the 

 Ruminants. 



