254; postpalatal length, ii8; basion to plane of front of second 

 upper molar, i68; zygomatic breadth, 184; ratio of zygomatic 

 breadth to basilar length, 75. (Merriam.) 



a.—sornbor^eri. {Ursiis), Bangs, Am. Nat., 1898, p. 500. 



Type locality. Okak, Labrador. 



Geogr. Distr. Labrador north to the limit of trees. 



Genl. Char. Skull compared with one of U. amcricanus from 

 Maine is "smaller, shorter and broader; brain case short and broad; 

 zygoma widely spread; frontal region low, broad and flat, with great 

 width across postorbital processes; nasals short; palate much shorter 

 and broader; molar teeth longer." 



Color. No skins have been obtained, therefore the color is un- 

 known. 



Measurements. Basilar length of Hensel, 205; occipito-nasal 

 length, 187.4; zygomatic breadth, 129.6; mastoid breadth, 51.2; pal- 

 atal length, 1 14.6; postpalatal length, gi; greatest length of single 

 half of mandible, 164. (Bangs, 1. c.) 



473. luteolus. (^Ursus). Griff. Cam. Anim., 1821, pp. 236, 237. 



(Col. pi.) 



Type locality. Louisiana. 



Geogr. Distr. Louisiana to Texas. Exact range unknown. 



Genl. Char. Size large; skull long and flat; fronto-parietal 

 region depressed; profile of top of skull (including crest) nearly a 

 straight line; sagittal crest long and high, about half the length of 

 upper side of skull in old age. Molars very large. 



Color. Normally black. A specimen in Phil. Zool. Gardens 

 (Forest and Stream, Dec. 16, 1892, p. 578), was rich reddish brown, 

 almost bay. When worn, the coat became pale yellowish brown, 

 uniform over all the body. 



Measurements. Skull of type. Gnathion to end of occipital crest, 

 326; gnathion to basion, 292; basilar length of Hensel, 288; zygo- 

 matic breadth, 187; occipito-sphenoid length, 89; postpalatal length, 

 134; basion to plane of front of last upper molar, 103; interorbital 

 breadth, 68; distance between postorbital processes, 97; occipito- 

 nasal length, 276. (Merriam.) 



474. floridanus. {Ursus), Merr. Proc. Biol. Soc. Wash., 1896, p. 81. 

 Type locality. Key Biscayne, Florida. 



Geogr. Distr. Everglades of Florida. 



Genl. Char. (Type.) Skull very long, high and narrow; frontal 

 region remarkably elevated, highest immediately behind postorbital 

 processes (more than 100 mm. above hinder part of palate); brain 

 case very long and narrow; interpterygoid fossa very long (71 mm.); 



