218 



TYLOMYS. 



FIG. 36. TYLOMYS NUDICAUDUS. 



No. 77919 U. S. Nat. Mus. Coll. Enlarged 1 A. 



UPPER TOOTH ROW. LOWER TOOTH ROW. 



Enlarged 6 times. Enlarged 6 times. 



196. tumbalensis (Tylomys), Merr., Proc. Wash. Acad. Scien., in, 



1901, p. 560. 

 TUMBALA RAT. 



Type locality. 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. 



