A New FieW-monse in Japan. 
Explanation of Plate IX. 
(Figs, i; I, a, 6. drawn by K. Yokoyama) 
Fig. I. Arvicola hatanedzumi, Sasaki i/i. 
Fig. I, a. Ditto. 
Fig. 2. Skull of ditto l/l. 
Fig. 3. Right fore foot i/i. 
Fig. 3, a. Right hind foot 1/1. 
Fig. 4. Molar series of right upper jaw 4/ 1 . 
Fig. 4, a. Ditto of left lower jaw 4/1. 
Fig. 5. Root of mulberry tree with the trace of teeth ; 
a blackish line shows the level of ground. 
Fig. 6. Nest with two openings 1/3. 
