Measurements. ''Skull: total length, 14. lo inches; end of inter- 

 maxillary to end of condyle, 13.70; greatest width, 7.20; greatest 

 height above base of cranium, 4.10; distance between orbits, 2.85; 

 distance between orbital processes, 3.80; length of nasal bones, 3.90; 

 width before nasals, 1.30; narrowest part of muzzle behind canines, 

 3.10; upper incisors from front to molars, 3.18; to hinder margin of 

 palate, 7; width between external edges, 1.80; upper molars, length 

 taken together, 3; least distance between, 1.80; from intermaxillary 

 to end of nasals, 6.27; to commencement of orbit, 5.60: between post- 

 orbital points and occiput, 7.80; from postorbital points to end of 

 nasals, 4.94; end of intermaxillaries, 7.40." (Baird.) 



471. richardsoni. {I'rstis), Mayne-Reid, Bruin; The Grand Bear 



Hunt, London, i860, Am. ed., 1864, p. 260. 



Type locality. Great Slave Lake, Arctic America. 



Geogr. Distr. Barren Grounds between Hudson Bay and 

 Mackenzie River; hilly regions east and north of Great Bear Lake; 

 lower Rockies west of the l^Iackenzie, possibly to the upper tribu- 

 taries of the Yukon." 



Genl. Char. Frontal shield of skull truncated posteriorly by the 

 temporal crests. These begin on the posterior edge of the postorbi- 

 tal processes, and go towards the median line, and form nearly a 

 right angle with the cranial axis. Muzzle short and slightly upturned. 

 Dentition is distinctly of the Grizzh' type. 



Color. Yellowish brown, sometimes very light, giving a " whit- 

 ish appearance to the animal." 



Measurements. Total length, 5 ft. 2 in.; tail, .6; height to top of 

 shoulder, 2 ft. g; length of sole of hind foot, .10. (Rich. Faun. Bor. 

 Am., 1829, p. 24. Barren Ground Bear.) 



D. Enarctus. 

 " Fur uniform throughout, either black or brownish; hair dark- 

 est towards tips; nose brown; feet moderate; fore claws not twice as 

 long as the hinder." 



472. americanus. (/'/•.v//.f), Pallas, Spicil. Zool., fasc. xiv, pp. 5-7, 



1780. 



Type locality. Eastern North America. 



Geogr. Distr. North America where forests exist, except per- 

 haps in Louisiana and Florida. 



1 Genl. Char. Size moderate; nails short; frontals usually ele- 

 vated, zygomata width considerable; teeth rather small. 



Color. Black; nose tan color. 



Measurements. Average size of four skulls: Length of Hensel, 



