Merriam — Nineteen New Bears from Western America. 149 



ably high, the deeply sulcate frontal shield rising abruptly high over 

 orbits, with thickened brows and large outstanding arched postorbital 

 processes. Frontal shield of moderate breadth ; deeply and broadly con- 

 cave between orbits, swollen over orbits and passing out into strongly 

 outstanding postorbitals, short-pointed posteriorly; naso-frontal region 

 deeply sulcate; middle part of nasals flat; sagittal crest high and reach- 

 ing anteriorly nearly midway from fronto-parietal suture to plane of 

 postorbitals; rostrum rather small and narrow; palate rather narrow; 

 postpalatal shelf rather broad; zygomata broadly and strongly outbowed; 

 mastoids rather long; underjaw long, its inferior margin rather long and 

 nearly straight; subangular tubercle considerably posterior to mental 

 foramen; coronoid blade broad, its apex only moderately recurved, 

 ending anteriorly to plane of condyle ; canines of medium size, the lower 

 ones rather massive ; molars of medium size, the upper rather small for 

 size of skull. 



Skull of adult female (No. 75613 rather old) from Henry House, 

 Alberta, Sept. 27, 1895, J. Alden Loring: Similar in general to skull of 

 male with the usual sexual differences, but frontals much less elevated; 

 top of skull rather low and flattish; frontal shield of moderate breadth, 

 broadly depressed interorbitally, the point long and lyrate; naso-frontal 

 region sulcate and strongly dished; postorbital processes large, elevated, 

 and horizontally outstanding ; sagittal crest short, covering only posterior 

 half of parietal suture ; braincase short and swollen ; postpalatal shelf 

 rather broad; zygomata moderately spreading, subtriangular, anterior 

 roots somewhat swollen. 



Skull measurements (c? old, type). — Basal length 323 mm. ;* occipito- 

 nasal length 304; palatal length 175; zygomatic breadth 229; interorbital 

 breadth 85. 



Ursus pallasi sp. nov. 



Type No. 205160 d old, U. S. National Museum, Biological Survey 

 Collection. From Donjek River, southwestern Yukon Territory. Col- 

 lected August, 1913, by T. A. Dixon. 



Cranial characters. — Skull of old male (the type): Size small, one of 

 the smallest of the grizzlies ; skull moderately elevated, flattish on top, 

 with relatively broad frontal shield. Frontal shield flattish, exceedingly 

 short-pointed posteriorly, faintly depressed medially between orbits, 

 slightly swollen on sides of median depression, strongly sloping to ros- 

 trum; postorbital processes small, peglike, horizontally outstanding; 

 naso-frontal region strongly dished ; rostrum short, somewhat depressed 

 and pugged; nasals rising anteriorly; nares small and subtruncate; 

 sagittal crest long, reaching to halfway between fronto-parietal suture 

 and plane of postorbitals; zygomatic arches moderately outstanding, 

 narrow and slender, not expanded vertically; palate and postpalatal 

 shelf short and broad ; mastoids long and spreading. Underjaw long for 

 size of skull; coronoid narrow above, the apex not reaching plane of 

 condyle ; teeth rather large for size of skull. 



* Estimated. 



