PEROMYSCUS. 
A. 
Fic. 33. PEROMYSCUS FURVUS. 
No. 10768 Am. Mus. Nat. Hist. C [wice nat. size. 
UppER TOOTH ROW LOWER TOOTH ROW 
Enlarged to times 
KEY LO THE SPECIES AND: SUBSPECIES. 
Size small, not over 190 mm. 
a. Tail equal to or less than half the length of 
the body and head. 
a.’ Above drab gray. 
a.’ Wander parts white, ears large... 2... P. taburonensts 
b.’’ Under parts buffy, ears small. 
a.’’’ Smaller oe aes: .....P. musculus 
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