INTRODUCTION. . XXvii 
Castor fiber, Americanus et ejus varietates. 
Fiber zibethicus et ejus varietates, 
Arvicola xanthognathus. 
»,  Pennsylvanicus. 
»  (Georychus) Hudsonius. 
Mus leucopus. 
Meriones Labradorius. 
Arctomys empetra. 
Sciurus (Tamias) Lysteri. 
x» Hudsonius. 
Pteromys Sabrinus. 
Lepus Americanus. 
Cervus alces. 
,»,  tarandus, var. sylvestris. 
The district just mentioned is bounded to the westward by a very 
flat limestone deposit, and the line of junction of the two formations 
is marked by a remarkable chain of rivers and lakes, among which are 
the Lake of the Woods, Lake Winipeg, Beaver Lake, and the middle 
portion of the Churchill or Missinippi River, all to the southward of 
the Methy portage ; and the Elk River, Athapescow Lake, Slave River, 
Great Slave Lake, and Martin Lake, to the northward of it. The 
whole of this district is well wooded ; it yields the fur-bearing animals 
most abundantly ; and a variety of the bison, termed from the circum- 
stance the wood bison, comes within its western border, in the more 
northern quarter. This animal has even extended its range to a par- 
ticular corner, named Slave Point, on the north side of Great Slave 
Lake, which is also composed of limestone. The following animals 
may be found in the limestone tract :— 
Vespertilio pruinosus. 
Sorex palustris. 
»  Forsteri. 
Condylura longicaudata. (southern parts only.) 
Ursus Americanus. 
Gulo luscus. 
Mustela (Putorius) vulgaris. 
oe = erminea, 
Pe a vison. 
d2 
