322 PAPPOGEOMYS. ORTHOGEOMYS. 
WHITE-NOSED POCKET GOPHER. 
Type locality. Atemajac, a suburb of Guadalajara, State of Jalisco, 
Mexico. 
Geogr. Distr. State of Jalisco, Mexico. Altitude, 4,000 to 5,100 
feet 
Genl. Char. Size small; nasal pad and tail naked. Skull similar 
to that of P. bullert, but generally larger. 
Color. General color of whole body pale plumbeous tinged with 
chestnut; palest on under parts; white patch on nose reaching nearly 
to eyes. 
Measurements. Total length, 226; tail vertebrz, 68; hind foot, 
31. Skull: basal length, 36.5; Hensel, 33; zygomatic width, 25.5; 
interorbital width, 7.5; length of upper molar series, 9.5; length of 
single half of mandible, 26.5. 
66. Orthogeomys. Straight-headed Pocket Gophers. 
eee IP ee 
3 
TS i? {= 
Orthogeomys Merr., Mon. Geomyide, N. Am. Faun., No. 8, p. 172, 
pl. and figs. Type Geomys scalops Thomas. 
Skull elongated, flat; frontal broad; orbital plates of frontal sepa- 
rated by orbitosphenoids; braincase subcylindrical; interorbital con- 
striction lacking; upper premolar with three or four enamel plates; 
upper incisor with one open sulcus. 
KEY TO: THE SPECIES: 
A. Pelage not bristly; nasal pad large. PAGE 
a. INasals lone. broad postenorly- 5 ae O. grandis 322 
b. Nasals long, narrow posteriorly. 
a.’ Premaxille very broad, inclined to a point 
posteriorly, on a line with the orbits. ......-- O. nelsont 324 
b.’ Premaxille narrower, truncate posteriorly, 
not reaching thevoOrbits. 47 = se... e n= eee O. scalops 324 
B. Pelage bristly; nasal pad small or absent........ O. latifrons 324 
322. grandis (Geomys), Thomas, Ann. Mag. Nat. Hist., 6th Ser., x11, 
LO9?,. ps2 70% 
GIANT PockEeT GOPHER. 
Type locality. Duenas, Guatemala. 
Genl. Char. Size large; fur coarse. Skulllarge, heavy; premaxille 
longer than nasals posteriorly; interorbital space broad, its edges 
rounded anteriorly and inflated; incisors pale yellow, with a deep 
groove; molars large. 
