PARAHIPPUS. 



91 



(Osborn, 1918) (1) Grinding teeth brachyodont; (2) superior premolars with little cement; (3) cement on ectoloph 

 and in upper and postfossettes of m 3 , also in outer valleys of p2-m 2 ; (4) lower premolars and molars with strong external 

 cingulum; (5) internal cingulum on superior premolars; (6) metaloph of m 1 longer than protoloph; (7) hypostyle sub- 

 triangular; (S) crochet on m 3 , probably worn from other teeth; (9) metaloph and protoloph uniting with ectoloph; (10) 



12. 



Fig. 67. Original figures of portions of the type of Parahippus crenidens Scott, Princeton Mus. No. 10430 (cast 

 Amer. Mus. 10782). (10) Superior grinding teeth, p 1-4 , m 1-2 , natural size; (9) external view of same, two-thirds natural 

 size. (11) External view of mandible, two-thirds natural size. (12) Crown view of inferior molar teeth, p 2 -m 3 , natural 

 size. (13) Lower portion of manus, one-half natural size. (14) Inner view of right tarsus, one-half natural size. After 

 Scott, 1894, PI. ii. 



external ribs slightly developed. This animal agrees with the P. nebrascensis group of Parahippus except that (11) it 

 exhibits cement on the grinding teeth. 



(Matthew, 1913) A doubtfully referred specimen, Amer. Mus. 14182 from the Sheep Creek beds of Nebraska, of 



