Cope.l ^Oo [j alli 18f 



The spine of the scapula rises abruptly from the neck as in Ruminantia, 

 and the coracoid process is short and obtuse. The spine continues to the 

 distal extremity, which is regularly convex. 



The most perfect innominata in my collection are deficient in the sym- 

 physis. The form of the ilium is more that of a hog than of a ruminant. 

 The peduncle is even stouter, and the superior border is abruptly expanded 

 below the middle of the length of the bone. The superior and inferior 

 borders are subparallel as in the hog, and not divergent as in the rumi- 

 nants. The anterior edge is acute, and uninterrupted by an anterior in- 

 ferior fossa or spine. The pubis is robust and transverse, and without 

 prominent basal pectineal tuberosity. The incisura acetabuli invades the 

 base of the pubis a little, but the ischium more extensively. The ob- 

 turator foramen is quite large. The distal border of the ischium is ob- 

 liquely truncated as in many other Artiodactyla, and more nearly re- 

 sembles that of the peccary than any other recent form I have observed. 

 The tuber proper is a convex edge, not thickened, and its superior edge is 

 continued into a strong up-looking tuberosity. This region is not so 

 robust as in most recent forms. 



The humerus of Oreodon is readily distinguished from that of recent 

 Artiodactyla by several peculiarities. The greater tuberosity is large, ris- 

 ing above the head ; and is incurved, terminating inwards in an acuminate 

 apex. Its border at the base is thrown into an obtuse angle. The lesser 

 tuberosity is small, and is well separated from the greater by a deep and 

 wide bicipital groove. The deltoid ridge is distinct. The condylar ex- 

 tremity is more transversely extended than in any recent Artiodactyle, 

 owing to the fact the posterior interior distal tuberosity is placed interior 

 to the trochlea instead of partially behind it, and that there is, in addition, 

 an internal epicondyle not seen in the recent suilline or ruminant mem- 

 bers of the order. The intercondylar ridge is strong, and wider than in 

 most recent ruminants ; in the suillines it has nothing like such a develop- 

 ment. Another peculiarity is the flange-like free border of the external 

 trochlea, which is especially recurved at its superior part. 



The radius is distinct from the ulna throughout. The relation of the 

 ulnar to the radiocarpal surface is posterior as well as exterior ; the com- 

 mon suture of the two, making an angle of 45° with the long axis of the 

 radiocarpal surface. The head is a transverse oval, with the inferior face 

 forming a regular curve without notch. Its articular surface is divided into 

 three portions in adaptation to the internal and external humeral trochlea 

 and the wide median ridge. The external face is beveled forwards above, 

 to fit the flange-like projection of the external trochlea. The shaft of the 

 radius is not very stout, and has a nearly equal transversely oval section 

 to near the distal expansion. Here are wide grooves for the extensor 

 tendons, one superior, the other obliquely exterior. The carpal articular 

 facet has the general ungulate characters. The scaphoid facet is concave 

 above, convex and condyloid below, and is only distinguished from the 



