314 CRATOGEOMYS. 



310a. estor (Cratogcomys), Merr., Mon. Geomyidae, N. Am. Faun., No. 



8, 1895, P- i55. pl- 8, figs. 4, 5- 

 LAS VIGAS POCKET GOPHER. 



Type locality. Las Vigas, State of Vera Cruz, Mexico. Altitude, 

 8,000 feet. 



Geogr. Distr. Northeastern foothills of Cofre de Perote and hills 

 to the north, State of Vera Cruz, Mexico. 



Genl. Char. Smaller than C. perotensis; small naked nasal pad; 

 hind feet and tail hairy. Skull: superior dutline nearly straight. 



Color. Apparently there is no difference in the coloration of 

 this form and that of C. perotensis, the same description acting 

 equally well for both. 



Measurements. Total length, 315; tail vertebrae, 94; hind foot, 

 41. Skull: basal length, 52; Hensel, 47-51 ; zygomatic width, 38-38.5; 

 interorbital width, 7-8; length of upper molar series, u; length of 

 mandible, 37.5-42. 



311. oreocetes (Cratogeomys) , Merr., Mon. Geomyidae, N. Am. Faun., 



No. 8, 1895, P- X S6' pi- 8, figs, i, 2. 

 MOUNTAIN GOPHER. 



Type locality. Mount Popocatepetl, State of Mexico, Mexico. 

 Altitude, 1 1, 5 oo feet. 



Geogr. Distr. Higher slopes of Mount Popocatepetl, Mexico. 



Genl. Char. Size large; small nasal pad; tail nearly naked. Skull: 

 temporal ridges developed; lambdoid crest present; bullae sub- 

 globular; groove on upper incisors on inner side wide; outer side of 

 tooth beveled. 



Color. Above dusky, head and middle of back darkest, washed 

 with pale brown; brown spot beneath eyes; fore feet dusky; hind 

 feet white. 



Measurements. Total length, 318; tail vertebras, 92; hind foot, 

 43. Skull: basal length, 51; Hensel, 47; zygomatic width, 32.5; 

 interorbital width, 8; length of upper tooth row, 10.5 ; length of single 

 half of mandible, 36. 



312. peregrinus (Cratogeomys} , Merr., Mon. Geomyidai, N. Am. Faun., 



No. 8, 1895, p. 158, pi. 8, fig. 3. 

 MOUNT IZTACCIHUATL POCKET GOPHER. 



Type locality. Mount Iztaccihuatl, State of Mexico, Mexico. 

 Altitude, 11,500 feet. 



Geogr. Distr. Higher slopes of Mount Iztaccihuatl, Mexico. 



Genl. Char. Size medium; fore foot large, claws nearly equaling 

 hind foot and claws; nasal pad small. Skull: zygomata broad and 

 bowed outward, rostrum short; nasals broad; premaxillae broad, 



