Proc. Biol. Soc. Wash., Vol. IX, 1894. 



Plate II. 



f 



Fig. 2. 



p&i4MM 



Fig. 4. 



A. M. WESTERGREN, DEL. 



FORBES LITH. MFG. CO. 



Figs. 1 and 2. Skull of the Type Arvicola terra i/oviv- Bangs. 

 Fig. 3. Maxillary Molar Series. About x 10' 

 Fig. 4. Mandibular Molar Series. About x lOl 



