Douglass : Dromomeryx. 467 



In skull No. 1542 the summit of the occiput is produced about 4 

 cm. posterior to the occipital condyles. 



Palate View. — The palate (No. 827, Carn. Mus. Cat. Vert. Foss. ) 

 is quite broad between the cheek teeth, but narrows rapidly anterior to 

 them. The anterior portion of the palatal notch is between the last 

 molars. The posterior narial opening is deep vertically on account 

 of the elevation of basi-cranial elements of the posterior portion of the 

 skull — the upward trend forward of the basi-cranial axis. The optic 

 foramen, the sphenoidal fissure, the foramen ovale, the anterior lacer- 

 ated foramen, the anterior jjortion of the tympanic bullae, and the pos- 

 terior lacerated foramen are in nearly straight lines converging forward 

 and bordering the basi-occipital and the convex portions of the basi- 

 sphenoid and presphenoid. There is a short process on the sphenoid 

 just antero-external to the large sphenoidal fissure. 



The glenoid articular surface is convex antero-externally. Between 

 this and the post-glenoid process the surface is concave antero-pos- 

 teriorly, but a broad antero-posterior convex ridge divides it into two 

 depressions. The post-glenoid process is rather small and low. The 

 tympanic bulla is small, but the anterior portion of the tympanic was 

 large. What I suppose to be the pit for the tympano-hyal is large. 

 The paroccipital process is low and flattened. It is directed antero- 

 internally and postero-externally. The antero-external face is con- 

 cave while the postero-internal one is convex. 



Dentition. — In specimen No. 827 (Carn. Mus. Cat. Vert. Foss.) 

 the most of the cheek teeth are in a good state of preservation (Plate 

 LXIII, Fig. 6). They are not greatly worn. They are not high- 

 crowned and the valleys between the internal and external crescents 

 are not deep. The inner crescents of the upper premolars are com- 

 paratively simple. The internal cusps are quite heavy. The anterior 

 outer pillar of Pi is well developed. On the outer faces of the molars 

 there are prominent anterior and median outer styles and they project 

 outward. The outer faces of the external crescents are very convex. 

 There are cingula on the anterior faces of the antero-inner cusps and 

 small accessory cusps or pillars on the antero-inner faces of the postero- 

 inner crescents. The teeth are not as large as those of Carnegie 

 Museum specimen No. 1542 (Plate LXIII, Figs, i and 3) or the types 

 of the genus (Nos. 8132 and 8133 of the Amer. Mus. Nat. Hist.). 

 The teeth of No. 1542 (Carn. Mus.) are somewhat complicated by 

 spurs extending into the median valleys from the inner crescents as 

 is the case in the types. 



