NEOTOMA, NELSONIA, 289 
FULVOUS-BELLIED Woop Rat. 
Type locality. Toluca Valley, State of Mexico, Mexico. 
Geogr. Distr. State of Mexico, Mexico. 
Genl. Char. Similar to N. tenuicauda, but larger; ears and feet 
small; tail slender. 
Color. Above fulvous, dusky on middle of back; under parts 
pale fulvous; hands and feet white; tail above blackish, beneath 
whitish. 
Measurements. Total length, 356; tail vertebrae, 163; hind foot, 
55. Nelsonia. 
=) Me = 16, 
>) 
Nelsonia Merr., Proc. Biol. Soc. Wash., x1, 1897, p. 277, figs. 14-15. 
Type Nelsonia neotomodon Merriam. 
Skull similar to that of a large Peromyscus, but flatter; antorbital 
slits faintly notching upper surface of maxillary root of zygoma; 
interior angle of antorbital slits protrudes forwards as processes; teeth 
large; crowns flat, with deep reéntrant angles; third upper molar 
with one deep external reéntrant angle separating the crown into 
Fia. 46. NELSONIA NEOTOMODON. 
No. go893 Am, Mus, Nat. Hist. Coll. Nat. size. 
UPPER TOOTH ROW, LOWER TOOTH ROW. 
Enlarged 6 times. Enlarged 6 times. 
