1(J0 Annals of the Carnegie Museum. 



Gonforni with the high temporal and sagittal crests. At the junction 

 of the latter, there is a deep triangular pit in the median line of the 

 frontals. in which the muscles of the forehead had attachment. Over 

 the orbit the frontal is quite inflated, which causes the eye to appear to 

 be placed rather low. The postorbital processes of the frontal and 

 malar meet to form a complete bony border for the orbit posteriorly, 

 a common character of the family. The supratemporal foramina are 

 of fairly large size and are located near the median line of the frontals. 

 From the exit of these foramina there are grooves extending forward 

 and downward which vary in depth. These grooves are common to 

 most artiodactyls, but are especially prominent in the Suidce. An- 

 teriorly the frontals gradually narrow and slope downward and forward 

 to meet the nasals. On account of the excessive lateral expansion of 

 the zygomatic process of the jugal and the postorbital process of the 

 frontal the eye has a forward look. The orbit is fairly large and sub- 

 circular in outline. There is a small lachrymal tubercle, and shallow 

 notches appear above and below the eminence. The lachrymal fora- 

 men is located within the orbit, as usual in the merycoidodonts. 



THE FACIAL REGION. 



The palate is quite broad transversely and somewhat irregularly 

 concave. The palatine process which meets the pterygoid is heavy 

 and the fossa between the posterior end of the maxillary and the process 

 is very shallow. The maxillary Is massive and the lateral aspect 

 presents an almost vertical wall from the alveolar border to the contact 

 with the nasal base as the facial depression for the zygomato-labial, 

 maxillo-nasal, and buccinator muscles are not deep in this individual. 

 The infra-orbital foramen is small and is located at the posterior boun- 

 dary of the canine depression, or directly over the posterior part of P-. 

 There is a considerable depression or pit in front of the orbit, but no 

 vacuity. The alveolar border is heav}-, its vertical diameter small. 

 The palatine plates are entirely fused on the median line, and the 

 maxillary-palatine suture is also closed; nor is there any discernible 

 suture between the maxillary and premaxillary. The maxillary ap- 

 parently terminates abruptly at the canine eminence, and is succeeded 

 by the extremely short, though broad, premaxillary. The latter is 

 especially remarkable in this species because of its extremely truncated 

 character. On a direct side view the alveolar border of the premaxil- 

 laries extends only very slightly in front of the anterior faces of the 



