HYUAOHYUS. 673 



mosal part of the zygoma is continuous with the lateral occipital crest, which 

 is not the case in existing tapirs. 



Vertehrce. — (1) The arterial canal of the atlas is not isolated in front as 

 in T. roulini, but notches the basis of the transverse process. (2) The axis 

 is longer than in T. roulini. (3) The neural spines, and especially the 

 metapophyses of the posterior dorsal vertebrae, are more elevated. (4) The 

 ends of the centra of the lumbars are flatter and more depressed. (5) The 

 diapophyses of the same are wider and longer and thinner, and the penulti- 

 mate articulates with the last by an angular process, which is not the case 

 in T. roulini. 



Scapula. — (1) This bone is equal in size to that of a T. roulini of con- 

 siderably greater general dimensions, and is hence relatively larger. (2) 

 The spine is not angulate as in that species, has a larger base, and larger 

 elevated margin. (3) The neck is more contracted, and (4) the coracoid 

 is not recurved as in T. roulini. (5) The sinus bounded below by the lat- 

 ter is much "shallower, and not bordered above by a recurved hook of the 

 margin. 



Humerus — (1) It is relatively smaller in ^. ea;mJM5. (2) The internal 

 bicipital ridge of T. roulini is wanting. (3) The external condyle is much 

 shorter, whence its border is nearer its trochlear rib. The radius has a 

 narrower head, (1) the external articular plane being shortened. (2) The 

 shaft is wider with a more acute longitudinal lateral ridge medially, and 

 more rounded distal end. The ulna is (1) absolutely nearly as long as in 

 T. roulini, being thus relatively longer. (2) It has three weak, longitudinal 

 ridges on a convex outer face; in T roulini the external face is divided by 

 a very prominent longitudinal angle from the radial cotylus, which spreads 

 distally, sending one angle to the upper and another to the lower base of 

 the distal epiphysis. 



Carpus. — This part is (1) absolutely and relatively smaller than in T. 

 roulini. (2) The pisiform is more cylindroid distally. (3) The scaphoid 

 is more produced backward on the inner side; the excavation of the inner 

 side is more continued as a concavity of the outer side of the front. (4) 

 The unciform has an acute tuberosity behind ; in T. roulini it is short, ver- 

 tical, and obtuse. (5) The trapezoides has a shorter, wider, and more 

 43 



