Merriam — Nineteen New Bears from. Western America. 145 



Old male (the type) compared with old male warhurtoni from Atnarko 

 and Iskoot Rivers and Chilkat Valley): Size decidedly smaller (but 

 occipito-sphenoid length same) ; zygomata less outbowed ; nasals more 

 projecting anteriorly; palate shorter; postpalatal shelf broader, flatter 

 and much shorter; mastoids shorter; underjaw slightly smaller; coronoid 

 blade narrower and more vertical. Canines (especially upper) more 

 slender ; M' narrower and less massive. 



Skull measurements ( c? old, type). — Basal length 322 mm.; occipito- 

 nasal length 325; palatal length 177; zygomatic breadth 229; interorbital 

 breadth 83. 



Ursus kwakiuti warburtoni * subsp. nov. 



WARBURTON PIKE GRIZZLY. 



Type No. 210576 c? old, U. S. National Museum, Biological Survey 

 Collection. From Atnarko River, B. C, July 15, 1915. E.H.Edwards. 



Range. — Coast region of southeastern Alaska and adjacent parts of 

 British Columbia from Chilkat River southeasterly to Atnarko River of 

 the Bella Coola (Skulls of adult males examined from Atnarko River, 

 Iskoot River near junction with Stikine, and Chilkat River Valley). 



Cranial characters. — Skull of adult males: Large and massive, rather 

 long and flattiah on top — not arched. Similar to male kwakiuti but with 

 much broader (less peglike) and flatter postorbitals, flatter frontal shield 

 (not deeply concave in old age), much shorter sagittal crest, somewhat 

 heavier dentition, especially broader and more massive M'. Easily dis- 

 tinguished from stikeenensis of the same region by the much greater 

 length of skull and lower jaw and lesser elevation of frontal region. 



Skull measurements (d* old, type). — Basal length 340 mm.; occipito- 

 nasal length 324; palatal length 185; zygomatic breadth 233; interorbital 

 breadth 85. 



Ursus mendocinensis sp. nov. 



Type from near Long Valley, Mendocino Co., Calif., No. 206625 c? old, 

 U. S. National Museum, Biological Survey Collection. Obtained through 

 Charles J . and Frank H. Hittell. 



Characters. — Size rather large, about equalling klamathensis but appar- 

 ently less than californicus and colusus ; external characters unknown. 

 Affinities with klamathensis, with which it may intergrade at the north. 



Cranial characters. — Skull short, broad, highly arched and strongly 

 dished, with widely outstanding zygomata and truncate occiput. Frontal 

 shield of moderate breadth, short-pointed posteriorly, slightly convex 

 between orbits, strongly sloping to rostrum; rostrum short, broad, and 

 strongly depressed; postorbital processes moderate, sub-peglike, horizon- 

 tally outstanding; sagittal crest high, thick, humped anteriorly, short 

 posteriorly; occiput obliquely truncate ; occipital overhang slight com- 



• Named in honor of the late Warburton Pike, author of The Barren Grounds of 

 Northern Ca-nada and The Subarctic Forest, who obtained a fine large typical skull on 

 the Iskoot, a few miles from its junction with the Stikine (No. 9 Provincial Museum, 

 Victoria, B. C). 



