256 RHITHRODONTOMYS. 
Reithrodontomys (sic), Giglioli, Richer. intorn. alla Distrib. Geog. 
Gen., Roma, 1873, p. 160. Type’ Mus leconti.. Aud. & 
Bachman. 
Reithrodon! Le Conte (nec Waterh.), Proc. Acad. Nat. Scien. 
Phils Seo) an 3 
Ochetodon Coues, Proc. Acad. Nat. Scien. Phil., 1874, p. 184. 
Body slender; size very small; tail as long as the body without 
the head; anterior face of upper incisors with a deep longitudinal 
FIG. 43. RHITHRODONTOMYS MEGALOTIS. 
No. 6739 Am. Mus, Nat. Hist. Coll. Enlarged 3 times 
UPPER TOOTH ROW LOWER TOOTH ROW 
Enlarged 12 times Enlarged 12 times 
