396 URSUS. 



of last molar, 47 ; at anterior end of first molar, 45 ; at posterior edge 

 of canines, 40 ; breadth of muzzle at outer sides of canines, 68 ; greatest 

 breadth of basioccipital, 49; of basisphenoid, 30; palatal arch to end 

 of pterygoid, 50; length of crown of last molar, 27; width, 15; from 

 anterior edge of canine to posterior edge of last molar, alveolar border, 

 100; length of mandible from angle to symphysis on top, 202; height 

 at condyle, 32; at coronoid process, 86; length of lower molar series, 

 alveolar border, 66. 



966. Ursus hylodromus Elliot. 



Ursns Jiylodronius Elliot, Pub. Field Columb. Mus., in, 1903, p. 257. 

 Zool. Ser. 

 Alberta Black Bear. 



Type locality. Alberta, Canada. 



Genl. Char. Skull: forehead prominent, elevated above the face; 

 highest part of braincase anterior to line from the roots of the 

 zygomata; width across postorbital processes very considerable; 

 nasals concave in outline, posterior ends elevated; braincase greatly 

 swollen on sides outward; zygomatic arches moderately expanded; 

 narial opening ver}^ large ; occipital crest prominent ; bullae wider than 

 long; tubular meatus elongate and narrow; pterygoid fossa broad, 

 narrowest anteriorly at palatal arch ; the pterygoid processes broad and 

 turned inward at their tips ; palate of equal width to last molar where 

 it narrows gradually to the pterygoid fossa; mandible very heavy, 

 upper end of coronoid process curving downward forming a hook. 



Measurements. Skull: total length, 312; occipito-nasal length, 

 257; Hensel, 270; zygomatic width, 173; width across postorbital pro- 

 cesses, 96 ; between orbits, 69 ; greatest width of braincase, 102 ; length 

 of nasals, 76; width of basioccipital, 47; of basisphenoid, 36; length 

 of pterygoid fossa, 46 ; posterior width at processes, 24; palatal length, 

 153; width between last molars, 45; length of upper molars, alveolar 

 border, 67 ; length of mandible, 217 ; depth at center of second molar, 

 37.5; height at coronoid process, 88; breadth of coronoid process at 

 hook, 40; beneath hook, 41; length of three lower molars, alveolar 

 border, 65. 



967. Ursus machetes Elliot. 



Ursus machetes Elliot, Pub. Field Columb. Mus., in, 1903, p. 235. 

 Zool. Ser. Id. Mamm. Middle Amer. & W. Indies, F. C. M. 

 Pub., IV, Pt. II, 1904, p. 481, pis. XLViii, XLix. Zool. Ser. 

 Fighting Bear. 



Type locality. Casas Grandes, Sierra Madre, State of Chihuahua, 

 Mexico. 



Geogr. Distr. Northern Mexico. 



