SYNAPTOMYS 



167 



f^ig.la 



'"'9 23 



Fig. 3a. 



Hg lb. 



fig.2b. 



Fig 3b 



Fig. 73. — Cheek-teeth of Synaptomys. 



Crown view3 : a. upper molars ; 6. lower molars : — 



1. S. (Symtptomys) fatuuti. Ontario. 



2. S. (Miclomys) .sp. Metlakatla, British Columbia. 



3. S. (Mictomys) borcalU. Type. 



