Fig. 142 — Skull and teeth of Onychomys leucogaster (Wied). 



1 to 5 of young; 6 and 7 of adult; i, skull and left under jaw from outside, twice natural size. Other figures 10 

 times natural size. From Merriam, N. A. Fauna, 2, 1889, Biol. Survey, U. S. Dept. Agr. 



484 



