650 General Notes. 
be regarded as specifically distinct. Hereafter, should intergrades 
be discovered, it may be necessary to consider it a sub-species. It 
may be characterized as follows :— 
EVOTOMYS DAWSONI sp. nov. 
Dawson's Red-backed Mouse. 
chestnut—not far from ferruginous; the sides are tawny gray, an 
the belly is strongly washed with ochraceous buff. The admixture 
ro- 
with 
3 
moiar sertes; 2 fet Cranial and Dental Characters. — Unfortu, 
: seres nately, the skull was badly smashed and part 
it altogether wanting ; hence no cranial characters can be made 
out. The teeth, however, remain, and are represented in the ac- 
companying cut. Their most marked peculiarity, compared with 
