318 



T^sl?- 



Ill' .S* 



'I 



I. 



MONOGRArHS OF NORTH AMERICAN RODENTIA. 



Tadle W.—Litt oftpecimena o/Lwve amehicanus var. vikoinianus. 



* HpocimcDfl from Museum of Couiparatlvo Zoology, Cambridgo, UaM. 



