218 TYLOMYS. 
FiG. 36. TYLOMYS NUDICAUDUS. 
No. 77919 U.S. Nat. Mus. Coll. Enlarged %. 
UPPER TOOTH ROW. LOWER TOOTH ROW. 
Enlarged 6 times. Enlarged 6 times. 
196. tumbalensis (7ylomys), Merr., Proc. Wash. Acad. Scien., 111, 
[QOI, p. 500. 
TUMBALA Rat. 
Type locahty. Tumbala, State of Chiapas, Mexico. 
Geogr. Distr. State of Chiapas, Mexico. 
Genl. Char. Size large; ears large, naked; tail long. Skull simi- 
lar to that of T. nudicaudus, but more slender and weaker; molar 
series large. 
