200 ‘THE OTtTawa NarToRALIST. [January 
trees had not almost cut them off before, the frost would not do it, 
and a great many fall without either frost or wind. 
After the leaves have fallen some trees cover up the ends of 
the broken threads with gum, as in the case of the horse chestnut, 
Here the cork cells that grow at the base of the leaf stalks are 
shaped something like horseshoes, and the gum-covered ends of 
the broken threads look like nails in the horseshoe. 
\ 
NOTES ON SOME BRITISH COLUMBIA MAMMALS. 
By Wm. SPREADBOROUGH. 
The mammals enumerated below were collected or observed 
along the International Boundary : 
BLACK-TAILED DEER—From the Skagit River to the coast. 
Common on the monntains just west of the Skagit. 
Mute DEER--Common from Elko to the Skagit. A few 
seen west of the Skagit 
WESTERN WHITE-TAILED DEER—Common in the valleys along 
streams from Midway to the Skagit. 
Doucias SguirREL—A number seen in the Skagit valley. 
Common from Chilliwack-Lake to the coast. 
Say’s SQUIRREL—Very abundant about timber line on the 
mountains just west ot the Skagit and from Princeton to the 
Skagit. . 
MounTAIN GROUND SQUIRREL—Very abundant from Midway 
to Sidley’s near Lake Osooyos. 
YELLOW-BELLIED MARMoT—Common from Cascade to Nine- 
mile Creek. A few seen about five miles west of Rossland. 
Hoary MarmMot—Common on nearly all the high mountains 
from the south fork of the Salmon River to the coast. 
Aptopontia, ‘‘ Mountain Beaver’? — Common from the 
Skagit to Sumas Lake, 
BEAVER—Saw a number of fresh signs along the Skagit from 
the Lake House to the boundary. Only one seen. 
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