. The land and sea mammals of Middle America and the West Indies . 25, xxvi, p. 339. Danis Gray, Ann. of Phil., xxvi, 1825, pp. 60, 339. Thalarctosf Gray, Ann. of Phil., xxvi, 1825, p. 62. Euarctos! Gray, Proc. Zool. Soc, 1864, p. 692. Size large; body heavy, bulky; three upper and under anteriormolars are very small and with but a single root, and are frequentlydeciduous; fourth upper premolar lacks inner tubercle supported bya separate root; fourth premolar larger than those before it, that inupper jaw has three roots, the one in the lower two; skull elongate;feet broad; toes armed with long
. The land and sea mammals of Middle America and the West Indies . 25, xxvi, p. 339. Danis Gray, Ann. of Phil., xxvi, 1825, pp. 60, 339. Thalarctosf Gray, Ann. of Phil., xxvi, 1825, p. 62. Euarctos! Gray, Proc. Zool. Soc, 1864, p. 692. Size large; body heavy, bulky; three upper and under anteriormolars are very small and with but a single root, and are frequentlydeciduous; fourth upper premolar lacks inner tubercle supported bya separate root; fourth premolar larger than those before it, that inupper jaw has three roots, the one in the lower two; skull elongate;feet broad; toes armed with long, somewhat curved, non-retractileclaws; palms and soles naked; tail exceedingly short; ears erect,rather short, hairy. KEY TO THE SPECIES. „_^ PAGE A. Front claws longer than hinder; fur shaggy. . .U. horriceiis 480 B. Front claws short, not longer than hinder; fur uniform, smooth U. machetes 481 A. shaggy; front claws longer than the hinder, broadly de-pressed, whitish; palate narrow and contracted behind; ears small;hind foot elongate. 480 Fig. LXV. Ursus horri/€us. Mexican Grizzly Bear. 477. horriaeus (Ursus), Baird, Mex. Bound. Surv., Mamm., ii, 1859, p. 24. Elliot, Syn. N. Am. Manim., 1901, p. Grizzly Bear. Type locality. Los Nogales, State of Sonera, Mexico, near borderof Pima County, Arizona. Geogr. Distr. States of Chihuahua and Sonora, Mexico, north toColorado, Utah, and southern California. Genl. Char. Size large; frontal region highest between post-orbital processes; sagittal crest prominent; skull long, narrow. Color. Variable as in northern grizzlies; general hue dark. Alarge specimen from Casas Grandes, Sierra Madre, State of Chihuahua,Mexico, has head and back mixed dark brown, black, and yellowishgray, and with a jet black patch between the shoulders; rump, legs,and sides black; chest and under parts dark brown; nails brownishwhite. Measurements. Skull of the Casas Grandes specimen. Occipito-nasal length, 310; Hensel, 312; great
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmammals, bookyear1904
