TEANOPUS. 295 
of jaw elongate, with lower border inflected and upturned, forming a 
shallow trough as in Teonoma, infracondylar notch deep; last lower 
molar with reentrant loop on inner side, passing in front of its mate 
on outer side. (Merr., 1. c.) 
Fig. 49. TEANOPUS PHENAX. 
No, 95839 U.S. Nat. Mus. Nat. size. Tooth rows enlarged 6 times. 
300. phenax (Teanopus), Merr., Proc. Biol. Soc. Wash., xvi, 1903, 
Doi: 
CHEATING Woop Rat. 
Type locality. Camoa, Rio Mayo, State of Sonora, Mexico. 
Genl. Char. Similar to Hodomys vetulus in size and appearance. 
Color. Above buffy gray; beneath yellowish white, plumbeous 
under fur showing on posterior half; cheeks pale gray; outer side of 
fore leg grayish dusky, inner side white; hind foot whitish; ankles 
dusky, bordered beneath with white. 
Measurements. Total length, 352; tail vertebre, 172; hind foot, 
37.5. okull: occipito-nasal length, 42.5; Hensel, 35; zygomatic 
width, 22; interorbital constriction, 5; length of nasals, 16; palatal 
length, 18; length of upper molar series, 7; length of mandible, 23; 
length of lower molar series, 8. 
