THE DISCOBOLI. 27 



tact; the separation of the two former by the squamosal being very 

 narrow; their margins are segments of circles, in the first two semicir- 

 cular, and in the third a still larger part of a complete circle. The 

 basioccipital is short, and widens anteriorly so as to expose itself as a 

 triangle at each side of the basisphenoid. Its comparative width is a 

 prominent characteristic of the latter. A little more than half of the 

 outer border of the mastoid is in contact with the hyomandibular ; 

 tlie articulation is close behind the middle of this edge. About one 

 fourth of the upper margin of the hyomandibular (23) joins the post^ 

 frontal, very little of which is exposed toward the side. From the front 

 much more of this frontal is to be seen ; its outline includes rather 

 more than a semicircle, the width being perhaps a little greater than the 

 heio-ht. A thin projection extends over the front part of the orbit. All 

 that is shown of the ethmoid is the low rounded prominence; below this 

 it meets the vomer in a moderately wide suture between the prefrontals. 

 The vomer is toothless; its front face is very steep. Each turbinal (20) 

 has an expanded comma-shape, with the apex directed toward the eye. 

 On the surface in the lower half of the length they are concave; else- 

 where they are thin and flat. 



The upper limb of tbe intermaxillary (17) is nearly as long as the 

 lower. In the osseous portion of the former there appear to be two pro- 

 cesses, the outer one shorter ; but the cartilaginous substance fills them 

 out, and continues toward the vomer as a thick and rounded prolonga- 

 tion of the bone. Toward the mouth this section becomes wider and 

 angular. The lower limb bears the upper teeth ; as it approaches the an- 

 gle of the mouth, it tapers to a point. At the upper end the maxillary (18) 

 is broad, and curves inward and backward, under the intermaxillary 

 and the forward end of the palatine (22); it is somewhat inflated under 

 the suborbital, but tapers and becomes slender at the outer extremity. 

 The anterior suborbital (19) is larger than the second ; it overlies and 

 is firmly attached to tlie end of the palatine, which separates it from 

 the head of the maxillary. The third suborbital (19') sends back a long, 

 thin, rather broad process, that droops toward the edge of the preoper- 

 culura. Only a single post-orbital (19") was discovered; it was very 

 slender, and extended over the greater part of the space behind the 

 eye toward the post-frontal from the suborbital process. The hyoman- 

 dibular (23) is about one and a half times as deep as broad, and the 



