56 



Rats and Mice 



Fig. 4. — Cheek Teeth of Cricetinae and Microtinae. 



A. Hamstek {Cricetus cricetus) — a, unworn, b, slightly worn ; B. Bank 

 Vole [Evotomys glareolus), two individuals ; C. Water Vole (Arvicola 

 amphibius) ', D. Field Vole {Microtus agrestis). Enlarged (x 5). In 

 each case, the left-hand figure represents the molars of the right upper 

 jaw, while the right-hand figure shows those of the left lower jaw. 



