82 Elliot — 2%ree Apparently New Species of Mammals. 



length of mandible, 101 ; height of coronoid process above angle, 35 ; 

 length of lower premolar and molar series, 54; length of lower carnassial 

 alveolar border, 21. 



Six specimens before me from the Sushitna River and four specimens 

 of G. liiscus from Canada exhibit the differences between the species as 

 expressed in the above description. The type and two of the others, old 

 individuals, are darker on the sides of the body than are the other three and 

 this part in these specimens is a buffy chestnut ; but all have the dark 

 heads which make them externally conspicuously different from the east- 

 ern animal with its gray head and black muzzle, and cause the new^ form 

 to be recognizable at a glance. The large bullae of the Alaskan animal will 

 also readily distinguish the skulls. 



