354 



MICROTIN^ 



Fig. 22a Fig. 22. Fig.24. Fig.25. 



-{ YFig28a. 

 Fig 18a ^ — 'kJ^^'^^/^^ \ I ^^^^^^XVAV ' ■' '^'■' 

 Fig. 19. Fig.27. ' rig. 28. 



Fig. 09. — Cheek-teeth of Mimomys. 

 (For explanation see oppoaite page.) 



