NEOTOMA. 



NELSONIA. 



289 



FULVOUS-BELLIED WOOD 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, 

 33- 



55. Nelsoiiia. 



Nelsonia Merr., Proc. Biol. Soc. Wash., xi, 1897, p. 277, figs. 14-15. 



Type Nelsonia neotomodon Merriam. 



Skull similar to that of a large Pcromyscus, 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 reentrant angles; third upper molar 

 with one deep external reentrant angle separating the crown into 



FIG. 46. NELSONIA NEOTOMODON. 



No. 90893 Am. Mus. Nat. Hist. Coll. Nat. size. 



UPPER TOOTH ROW. LOWER TOOTH ROW. 



Enlarged 6 times. Enlarged 6 times. 



