96 Mr. E. D. Cope on the 



the lachrymal is exposed on the external surface. The ptery- 

 goid bone is distinct, and is nearly equally bounded by the 

 sphenoid and palatine on the outer side. The inferior suture 

 of the orbito-sphenoid runs in a groove, which is deepest 

 anteriorly. 



The crowns of all the incisor teeth are narrow or compressed, 

 and, though slightly worn, present no indication of notch. 

 As usual, the external ones are much the largest in antero- 

 posterior diameter. The canines have robust fangs and 

 rapidly tapering crowns, which are but little compressed. The 

 first superior premolar is one-rooted, and the crown is simple. 

 The crown of the second is without posterior heel and tubercle, 

 while the third possesses both. The sectorial is relatively 

 short, less so than in G. latrans ; the blades are low and 

 obtuse as compared with recent species, and the notch sepa- 

 rating them is quite open ; the anterior external heel is 

 small ; and there is no anterior external tubercle. The first 

 tubercular molar is large, and the crown is narrower than that 

 of G. latrans ; it has an obtuse external cingulum, two ex- 

 ternal conical cusps, a V-shaped median ridge, and a wide 

 internal cingulum ; this crown differs from the corresponding 

 one of C. latrans in having conical instead of compressed 

 external cusps, and a simple V-shaped crest within instead of 

 two adjacent cusps. The second tubercular is smaller than in 

 C. latrans, and its tubercles are less distinct. There are two 

 outer tubercles, a V-shaped ridge, and an inner cingulum, all 

 very obscure. The enamel of all these teeth is smooth. 



Measurements of Cranium. 



metre. 

 Length along base of skull, including incisive border 



and occipital condyle "160 



Length of skull to palatal notch -075 



Length of skull to posterior border of pterygoid bone. "102 



Length to front of orbit axially "046 



Width between zygomas (greatest) '094 



Width between orbits (least) "036 



Width at postorbital constriction 021 



Width between bases of canines '017 



Width between bases of second tuberculars - 027 



Width between otic bullae *009 



Width between apices of paroccipitals '042 



Width of foramen magnum '017 



Width of occiput above "032 



Six well-preserved crania of this species are embraced in 

 the collection ; and the mandible remains attached to some of 

 them. One of these exhibits the following characters : — There 

 is a well-developed marginal lobe of the posterior cutting-edge 



