316 CRATOGEOMYS. PLATYGEOMYS. 
30-38; interorbital width, 6.5—7.5; length of upper tooth row, 9.5—10.5; 
length of single half of mandible, 31.5—38. 
a.—goldmani (Cratogeomys), Merr., Mon. Geomyide, N. Am. Faun., 
No. 8, 1895, p. 160. 
GoLpDMAN’s Pocket GOPHER. 
Type locality. Cafiitas, State of Zacatecas, Mexico. 
Geogr. Distr. State of Zacatecas, Mexico. 
Genl. Char. Similar to C. castanops in coloration. Skull: rostrum 
shorter than that of C. castanops; braincase broader; basioccipital 
somewhat larger. 
Color. Above mixed black and buffy ochraceous; under parts 
paler. 
Measurements. Total length, 270; tail vertebra, 83; hind foot, 
34. Skull: basal length, 44.5-46; Hensel, 41-42.5; zygomatic width, 
32-32.5; interorbital width, 7.5; length of upper molar series, 9-9.5; 
length of single half of mandible, 31—32.5. 
314. fulvescens (Cratogeomys), Merr., Mon. Geomyide, N. Am. 
Faun:; No. 8; 1895, p..rényy 19; fig. ay 
Futvous Pocket GOPHER. 
Type locality. Chalchicomula, State of Puebla, Mexico. 
Geogr. Distr. States of Puebla and Tlaxcala, from “Esperanza -° 
north to Perote and west to the northeast base of Mount Malinche, 
_in Tlaxcala,’’ Mexico. 
Genl. Char. Similar to C. castanops, but larger and darker; 
superior outline of skull convex; fronto maxillary suture reaching 
anteriorly the plane of the front of the zygoma. 
Color. Above mixed yellowish brown and blackish; under parts 
ochraceous buff. 
Measurements. Total length, 318; tail vertebra, 102; hind foot, 
43. Skull: basal length, 49-55; Hensel, 45-50.5; zygomatic width, 
34-40; interorbital width, 6.5—8; length of upper molar series, ro—-12; 
length of single half of mandible, 35-38. 
64. Platygeomys. Broad-headed Pocket Gophers. 
L—: Pa = sa: 
i i LI "ee | 
Platygeomys Merr., Mon. Geomyide, N. Am. Faun., No. 8, 1895, 
p. 162, pls. and figs. Type Geomys gymnurus Merriam. 
Skull large, massive, flat; squamosals expanded laterally, giving 
considerable width to the occipital region, concealing the postglenoid 
notch, and increasing the glenoid fossa; zygomata heavy and widely 
spread; jugal large and broad; endoturbinals forming an elongated 
