SYNOPSIS. 



197 



Diuoceras agreste, Marsh, n. s. 



Woodcut: 15, p. 19. 



In this species, the nasals are separated in front by a distinct suture, 

 extending- back beyond the anterior projection of the premaxillary bone. 

 They taper to a blunt conical point, which is much roughened, but 

 presents no certain evidence of the attachment of prenasals. 



The diastema behind the upper canine is nearly straight, and of 

 moderate length (about 7 cm.), and, in this region, the palate is strongly 

 vaulted. The palato-niaxillary foramen is opposite the first premolar. 



The posterior end of the malar bone was received into a shallow j)it, 

 in front of the glenoid cavity of the squamosal. 



The occiput (figure 15, page 19) has the upper angles well rounded, 

 and presents a median tubercle in the line of the vertical ridge. The 

 foramen magnum is broad, and rises somewhat above the level of the 

 condyles. 



The type specimen (number 1221) of this species was discovered in 

 1873, by Mr. L. Lamotte, near Spanisli John's Meadow, about thirty miles 

 east-southeast of Fort Bridger, and fifteen miles west of Green River, 

 Wyoming 



This specimen consists of a skull, scapula, ribs, etc. 



The geological horizon of this species is in the Dinoceras Ijeds of tlie 

 Middle Eocene. 



The known remains of this species are jjreserved in the Yale College 

 Museiim. 



Dinoceras cuneum, Marsh, n. s. 



Woodcuts 93, 94, p. 77 ; 170, 171, below. 



Fig. no. 



h. 



Figure HO. — Nasals nf X)mocera« c«nra»i. Marsh (No. 1207). 

 a. side view; 6. top view; c. front view. 



'' One-fifth natural size. 



The skull in this species tapers in front, but, in the type-specimen 

 (numlier 1042), the nasal protuberances are not well preserverl. The 



