NEOTOMODON. 293 
and internally; third lower molar with two loops and one reéntrant 
angle externally, and one internal anterior loop and one reéntrant 
angle. 
Fig. 48. NEOTOMODON ALSTONI. 
No, 13887 Am. Mus, Nat. Hist. Coll. Enlarged %. 
UPPER TOOTH ROW, LOWER TOOTH ROW 
Enlarged 7 times, Enlarged 7 times, 
KEY LO THE SPECIES. 
A. Ears large, nearly naked; tail short, fur soft, 
plantar tubercles, 6; mamme, 6. 
a. Breast buffy. 
a.’ Under parts white. PAGE 
a. Lentertotal length, ara tit..7... 00d V. perotensis 293 
be Simei tote! length, ro4.mm............0V omeabe 294 
b.’ Under parts plumbeous, washed with 
WYRE ENS coher at. 'a cas Reenter ns aoe CN N. alstont 294 
297. perotensis (Neotomodon), Merr., Proc. Biol. Soc. Wash., xu, 
1898, p. 129. 
Perote Woop Rat. 
Type locahty. Cofre de Perote, State of Vera Cruz, Mexico. 
Altitude, 9,500 feet. 
Geogr. Distr. State of Vera Cruz, Mexico. 
Genl. Char. Similar to N. alstont, but ears and tail shorter. 
