246 



UNGTTLATA. 



described and figured by the present writer in the ' Geolo- 

 gical Magazine/ loc. cit. The figured ramus is complete, 



Fig. 36. 



Anthracotherium gresslyi (Meyer). — The right ramus of the mandible, and the 

 lower cheek-dentition ; from the Headon beds of Hordwell. \. 



with the exception of the symphysis, and shows six cheek- 

 teeth in apposition, in advance of which there is a long 

 diastema, followed by the broken base of the canine. The 

 other ramus shows the six cheek-teeth. The molars 

 resemble those of Anthracotherium ; each premolar is 

 inserted by two fangs ; and the fourth has a large inner 

 cusp. There is no trace of pmTT. The extreme length is 

 0,114 ; the extreme height at the coronoid process 0,052 ; 

 the depth at m. 3 0,017, at pm. 2 0,015 ; the length of the 

 space occupied by the six cheek-teeth 0,052, that by the 

 three true molars 0,030 ; that of mTT 0,0085, of m72 

 0,0087, of m. 3 0,013 ; and the width of mTB 0,008. 



Hastings Collection. Purchased, 1855. 



37333. A left upper and a lower true molar belonging to the same 

 or a closely allied species ; from the Bembridge beds (Upper 

 Eocene) of the Isle of Wight. The upper molar is slightly 

 smaller than m. 1 of No. 29851. 



Presented by F. E. Edwards, Esq., 1863. 



