152 



SCOTT. 



[Vol. V. 



V. The Fore Limb. 



The scapula is very similar to that of the tragulines. The 

 glenoid cavity is small and rounded. The coracoid process 

 small, slender, and strongly recurved. The neck is very slender 

 and contracted, and continues for some distance upward ; the 

 coracoid border curves gently forward for most of its length, 



while the glenoid border is nearly 

 straight. The spine does not arise 

 so near to the glenoid cavity as in 

 Tragu/its, but rises higher. The 

 acromion is more prominent, and 

 projects more strongly downward 

 than in that genus. As in most of 

 the ruminants, the spine is placed 

 much nearer to the coracoid than 

 to the glenoid border, thus making 

 the post-scapular fossa very much 

 larger than the prescapular, which, 

 indeed, is extremely narrow. 



The humerus is a stouter bone 

 than that of Tragulus, though con- 

 structed very much like it ; the head 

 is somewhat larger and heavier, the 

 external tuberosity higher and more 

 massive, but less hook-like and over- 

 hanging the bicipital groove less ; 

 the internal tuberosity is heavier but 

 less compressed and prominent, and 

 consequently the bicipital groove is 

 not so deep. The shaft is slender, but of greater antero-pos- 

 terior diameter, and relatively longer. The distal end is very 

 much alike in the two genera, the trochlea oblique to the long 

 axis of the shaft, with large internal and small external con- 

 dyle, separated by the prominent intercondylar ridge. 



The radius and ulna are entirely separate throughout their 

 length, and show no tendency to co-ossification. The former is 

 decidedly longer than in Tragulus and proportionately more 

 slender. The proximal end is verv much alike in the two 

 genera, except that the groove for the intercondylar ridge of the 



Fig. D. — Left humerus and ra- 

 dius of Leptomeryx Evansi ; nat- 

 ural size. Cope collection. 



