LIST OF SPECIES. 
XXXVII 
Page. 
71. —Ursus americanus, Pallas.—Black Bear.—United States generally. 225 
71 a .—Ursus americanus var. cinnamoneus, Aud. & Bach.—Rocky Mountains and 
Oregon. 228 
72. —Ursus maritimus, Linn.—White or Polar Bear.—Shores and Islands of Arctic 
Regions. . 229 
21. DIDELPHYS, Linn. 232 
73. —Didelphys virginiana, Shaw.—Possum.—From Hudson River to the southern part 
of the eastern United States, and west to the Missouri. Hot in south¬ 
ern Texas. 232 
74. —Didelphys californiea, Bennet.—Texas Possum.—Rio Grande of Texas to the City 
of Mexico, and west to Lower California. 233 
. 22. SCIURUS, Linnaeus. 243 
75. —Sciurus vulpinus, Gmelin.—Southern Fox Squirrel.—North Carolina to Florida, 
and along the Gulf States to eastern Texas. 246 
76. —Sciurus cinereus, Linn.—Cat Squirrel; Pennsylvania Fox Squirrel.—New Jersey 
to Virginia, and west to the Alleghenies... 248 
77. —Sciurus ludovicianus, Custis.—Western Fox Squirrel.—Mississippi valley. 251 
78. —Sciurus limitis, Baird, (n. s.)—Pecos Fox Squirrel.—Pecos River, Texas. 256 
79. —Sciurus carolinensis, Gm.—Gray Squirrel; Black Squirrel. (Black var.)—Eastern 
United States to the Missouri River. 256 
79 a .—Sciurus carolinensis, var. mexicanus?—Mexican Gray Squirrel.—Northern 
Mexico... . 263 
80. —Sciurus fossor, Peale.—California Gray Squirrel.—Pacific Coast from San Diego, 
California, to the Columbia River, at Fort Dalles. 264 
81. —Sciurus castanonotus—Baird, (n. s.)—Chestnut Backed Squirrel.—Southern Rocky 
Mountains. (Fort Webster). 266 
82. —Sciurus aberti, Woodhouse.—Tuft-Eared Squirrel.—San Francisco Mountains, New 
Mexico. . 267 
83. —Sciurus hudsonius, Pallas.—Red Squirrel; Chickaree.—Labrador (Lat. 56°) to 
Mississippi; and in the United States from the Atlantic to the Missouri 
River.'.. . 260 
84. —Sciurus fremontii, Towns.—Mountain Gray Squirrel. 272 
85. —Sciurus richardsonii, Bach.—Richardson’s Squirrel.—From the Main Rocky Moun¬ 
tains to the Cascade Range. 273 
