318 PLATYGEOMYS. 
KEY TO SPECIES AND SUBSPECDES: 
A. Nasals wedge-shaped; hind feet nearly naked. PAGE 
a. Above sooty, washed with reddish brown...... P.jumosus 318 
ib. Above chestnutenslateiblacka so. 4-5 eee ac P.gymnurus 318 
B. Nasals truncate; hind feet hairy, whitish. 
a) DOVE LIVER DROW. ¢ sides cred] tin. a ieeeee re P.tylorhinus 319 
be ‘Above palestuliousei:5.5 sank alts ieee P.t. angustirostris 319 
ey Above chestaut: 7. oe roy hiner, eae P. plamiceps 319 
d-vAbovespale, sdullichestratites a. er eee ena P. neglectus 319 
315. fumosus (Geomys), Merr., Proc. Biol. Soc. Wash., vil, 1892, p. 
165. 
fumosus (Platygeomys), Merr., Mon. Geomyide, N. Am. Faun., 
No. 82/1805, p) 270, ole mar, tie 64) pls TA eee 
Sooty Pocket GOPHER. 
Type locality. Colima City, State of Colima, Mexico. 
Geogr. Distr. State of Colima, Mexico. 
Genl. Char. Size medium; tail and hind feet nearly naked. 
Skull: posterior portion of cranium broad; squamosals expanded; 
zygomata rounded anteriorly, greatest width at median portion; 
nasals wedge-shaped. 
Color. Above sooty washed with reddish brown; under parts pale 
plumbeous washed with hight brown. 
Measurements. Total length, 287; tail vertebra, 82; hind foot, 
42. Skull: basal length, 49-55.5; Hensel, 44-51; zygomatic width, 
35.5-39; interorbital width, 8-9.5; length of upper molar series, 
r1.5—13; length of single half of mandible, 40.5—46.5. 
316. gymnurus (Geomys), Merr., Proc. Biol. Soc. Wash., vil, 1892, 
py 166. 
gymnurus (Platygeomys), Merr., Mon. Geomyide, N. Am. Faun., 
No. 8, 1895, p. 164, pls. and figs. 
NAKED-TAILED PocKET GOPHER. 
Type locality. Zapotlan, State of Jalisco, Mexico. 
Geogr. Distr. Valley of Zapotlan and slopes of the Sierra Nevada 
de Colima, State of Jalisco, Mexico. 
Genl. Char. Size large; pad on nose and tail naked; feet nearly 
hairless. 
Color. Upper parts chestnut, sometimes slate black; under parts 
paler; young slate black; sides and rump with whitish bristles. 
Measurements. Total length, 352; tail vertebra, 105; hind foot, 
53. Skull: basal length, 57—-62.5; Hensel, 53-57.5; zygomatic width, 
42-46.5; interorbital width, 9-10; length of upper molar series, 
13-14.5; length of single half of mandible, 41-45. 
