I38 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



EXPLANATION OF PLATES 



Plate XV 



All figures natural size except 7 and 8, which are enlarged about one and 

 three-fourths. 



Fig. I. Ventral view of skull of Ochotoiia cansus, Cat. No. 144,030, U. S. 

 N. M., type, from Taocheo, province of Kan-su, China. 



2. Dorsal view of same. 



3. Lateral view of same. 



4. Ventral view of skull of Myotalpa .cansus, Cat. No. 144,022, U. S. 



N. M., type, from Taocheo, province of Kan-su, China. 



5. Dorsal view of same. 



6. Lateral view of same. 



7. Enlarged view of right upper molar series of same. 



8. Enlarged view of right lower molar series. 



9. Left fore foot of same. 

 10. Left hind foot of same. 



Plate XVI 



Ncmorrhccdus argyrochatus (Heude), shot by W. N. Ruhl, near Taocheo, 

 China, in fall of 1906. 



