78 Annals of the Carnegie Museum. 



articulating faces less distinct from one another than in the European 

 genus. The lunar upon the whole is perhaps more suggestive of 

 Anoplotherium inasmuch as the proximal articulation extends back- 

 ward and downward in a similarly gentle slope to very nearly the 

 palmar face without the sudden downward pitch, which is seen in the 

 posterior half of this articulation in Diplobune. The distal articula- 

 tions for the magnum and unciform, on the other hand, are more 

 subequal than in Anoplotherium and in this respect the lunar in the 

 present genus is perhaps more like Diplobune. The dorsal face of the 

 cuneiform in the latter genus is of uniform height, while in the present 

 genus it is highest radially and decreases in the ulnar direction, due 

 mainly to the upward turn of the unciform facet in the ulnar region. 

 (See PL XXXVII, Fig. 17.) The posterior portion of the lunar 

 facet on the unciform of No. 3394 is extremely convex from side to 

 side, and terminates supero-radially in a blunt cone, quite unlike 

 what is seen in either Diplobune or Anoplotherium, but the general 

 characters of the unciform are more nearly like those of that bone in 

 Diplobime. 



The metapodials which have been associated with the type have 

 their distal articulation for the proximal phalanx very convex and 

 carnivore-like. Mc. II is represented by the upper end in both type 

 and paratype. This bone is slenderer in proportion than in Diplobune, 

 but as in the latter genus there is a facet for Mc. I. The phalanges 

 of the proximal and median rows are broad and depressed, while a 

 terminal phalanx, belonging to specimen No. 3394, indicates that these 

 elements are high, laterally compressed, and claw-like, with a sudden 

 broadening along the plantar borders in front of the sub-ungual 

 process, and that there is a large nutrient foramen on either side near 

 the plantar face of the bone. The bone closely resembles that in 

 Diplobune. 



Enough is preserved of the astragalus to indicate that it was low 

 and broad as in the European anoplotheres. The calcaneum is better 

 preserved and only in the more minute details does it differ from that 

 of Diplobune. In the latter genus the internal or tibial face of the 

 tuber calcis is less convex, the peroneal tubercle less developed, the 

 eminence on the dorsal border which articulates with the fibula is 

 smaller, and the facet for the cuboid is less extensive both laterally 

 and antero-posteriorly. The cuboid is also very suggestive of Diplo- 

 bune, though broader, lower, and having the astragalar and calcaneal 



