CHAPTER YTI. 



THE FORE LIMBS. 

 (Plates XXVII-XXXVIII, LV, and LVI.) 



The limb bones in the Diiwcerata are nearly or quite solid, and this 

 is true of all the skeleton, a portion of" the skull alone excepted. 



Tlie fore limbs in the Dinocerata have a general resemblance to those 

 of Proboscidians. The different segments, however, are more inclined to 

 each other, and the bones that compose them are stouter, and more 

 massive. 



The Scapula. (Plate XXVII.) 



The scapula of TMiioceras viirahilc, in its general form, is similar to 

 that of the elephant. It is triangular in outline, with the anterior, or 

 coracoid, border slightly longer than either of the other t^^•o margins, 

 which are about equal to each other, if the glenoid border be considered as 

 including the glenoid cavity. The coracoid border is excavated by a 

 broad rounded emargination, just above the coracoid process, but beyond 

 this sinus, it runs nearly straight to the apex of the bone, which is more 

 acute than in the mastodon. 



The supra-scapular border is moderately curved throughout, and the 

 posterior angle appears to be less acute than in the Proboscidians. The 

 glenoid border is nearly in a line with tlie glenoid cavity, so that the 

 constriction above the cavity is scarcely evident in the posterior margin of 



the bone. ~ 



87 



