68 MEMOIRS OE THE CARNEGIE MUSEUM 



Dentition If, C\, P-|, M|; premolars but little or not at all reduced in size; anterior 

 premolars separated by considerable diastemata; canines stout and without anterior or 

 posterior cutting edge; sagittal crest long and very high throughout its entire length, 

 extending a little in front of temporal constriction; capacity of brain-case very small in 

 proportion to size of skull. Rami of lower jaw not coossified, with inferior border very 

 sinuous and symphysial area much restricted. 



DAPHCENUS FELINUS Scott. 



Specific characters : Scott has distinguished this species as follows : 

 "The inferior dental series of this species slightly exceeds in length that of D. 

 vetus and the sectorial is larger. The lower tubercular molars are inserted in the 

 border of the ascending ramus of the mandible, and, judging from the alveoli, were 

 reduced in size. The horizontal ramus is not much longer, but much heavier than 

 in D. vetus, and has a more sinuous ventral border, which rises more beneath the 

 masseteric fossa. The limb bones and vertebrae are somewhat larger and heavier 

 than in -D. vetus, and the neural spines of the lumbar vertebrae are very high and 

 inclined stronglj'' forward. In size D. felinus is the largest and most massive species 

 of the genus." 



Among the material in our collections secured by Mr. Peterson are portions of 

 two skeletons, Nos. 492 and 553, which I have referred to this species, although 

 they do not in all respects agree with the characters mentioned above. This is 

 especially applicable to the position of the lower tubercular molars, which in D. 

 felinus, according to Scott, are inserted in the border of the ascending ramus. In 

 No. 492 both rami are well preserved, and one of these teeth is still in situ, but 

 its position is in the horizontal ramus rather than the ascending, as is well shown 

 in PI. XVI., Fig. 2. I do not, however, consider this difference as of specific impor- 

 tance, since, on actual comparison, our material, in other respects, agrees remarkably 

 well with the type. While belonging to a slightly smaller individual it is decidedly 

 larger than the type of D. vetus, and differs from the latter in a number of impor- 

 tant characters. 



THE DENTAL AND OSTEOLOGICAL CHARACTERS OF DAPHCENUS 



FELINUS Scott. 



The following description of the dental and osteological characters of D. felinus 

 is based on the following material, belonging to the collections of this Museum. 

 * No. 492, consisting of a nearly complete skull with lower jaw, atlas, 12 dorsals, 



