168 R. EROOM. 



Natal species may yet be found in Cape Colony when the beds 

 are more fnlly worked. 



Dicynodon ingens n. sp. PI. XXVIII, fig's. 1-4. 



This new species of Dicynodon is represented by a con- 

 siderable portion of the snout of an animal which is perhaps 

 an adult female ; by the imperfect front portion of the skull 

 of an immature animal ; by four tusks, two probably of adult 

 males and two of females ; and by a number of fragments of 

 limb bones. The snout of the supposed adult female is taken 

 as the type. Of species already known only three at all 

 resemble the Natal form. These are D. leoniceps, D. simo- 

 cephalus, and D. latifrons. Neither D. leoniceps nor 

 D. latifrons have ever been discovered of nearly such large 

 size as D. ingens, and there are marked differences. 



The specimen which is taken as the type is the fairly 

 well preserved palatal portion of a large skull, compris- 

 ing the maxillar}^ bones, the pre-maxillary bones, most of 

 the vomer, and parts of the palatines. The tusks are 

 broken off at their bases. In general appearance the palate 

 resembles that of D. leoniceps in being much longer than 

 broad. Unfortunatelj'- the palate of D. leoniceps has not 

 been cleared of matrix, and it is impossible therefore to 

 institute detailed comparisons. The tusks in D. ingens are, 

 however, very much longer than in D. leoniceps. At the 

 point where broken across in the type specimen the tusk 

 measures 40 mm. in diameter, and is as near as may be 

 circular in section. The distance between the tusks is 82 mm., 

 but there is a slight degree of lateral crushing. From the 

 line joining the two tusks to the front of the snout the dis- 

 tance is about 150 mm. At the hollow immediately in front 

 of the great dilatation caused by the tusk the transverse 

 measurement of the snout is 120 mm., and at the tusk region 

 probably 190 mm. The median ridge is very prominent, and 

 extends from about 35 mm. in front of the plane passing 

 along the anterior border of the tusks to near the plane pass- 



