482 M. R. Thorpe — New Fossil Carnivora. 



teeth are not distinctive, except M^, which is very small, 

 oval, and situated about medially with respect to M^ 

 The inferior canine is recurved and the tooth row is 

 continuous, with no diastemata. The ramus is slender ; 

 masseteric fossa very deep and large ; angle prominent ; 

 and coronoid wide, thin, and high. The condyle is 

 situated on a line with the dental series. There are three 

 mental foramina in the same horizontal line. 



/0272 TYPE 

 Y. p. M. 



Fig. 5. — OUgohunis darhyi, sp. iiov. Holotvpe. Inferior \dew, right half 

 of skull. Nat. size. 



Dimensions. 



mm. 



Skull, length, occip. condyles to canine, inc 96 



Bizygomatic diameter 47 



Diameter, post-orbital constriction ; . . 19.5 



Superior dental series, inc. C, length 40 



Superior molar series, length 8.2 



Superior premolar series, length 25.2 



Ramus, length, inc. canine 66 



Depth, coronoid to angle 28.5 



Depth below middle of M^ 13 



Inferior molar series, length 15 



Inferior premolar series, length 21.5 



In so far as comparable parts are present of both the 

 type of the genus, 0. crassivultus Cope, and 0. darhyi, 

 sp. nov., the latter differs chiefly in (1) smaller size, (2) 

 much greater degree of dolichocephaly, (3) a continuous 

 inferior and superior tooth row, (4) larger size of infra- 

 orbital foramen, (5) different size and shape of masseteric 

 fossa, (6) different proportions of anterior zygomatic 

 pedicle, (7) much less prominent angle of ramus, (8) con- 

 siderably smaller deuterocone of P% and (9) different 

 geographical locality and geological horizon. Many 

 minor differences may also be noted. 



The new species differs from the type of 0. lepidus 



