Sciuropterus alpinus zaphaeus Osgood, Proc. Biol. Soc. Washington, 18:133, April 18, 1905. (Type from Helm Bay, Cleveland Peninsula, southeastern Alaska.)
Glaucomys sabrinus zaphaeus A. H. Howell, N. Amer. Fauna, 44:43, June 13, 1918.
Specimens examined.—One from Yukon Territory: 1½ mi. S and 3 mi. E Dalton Post, 2500 ft.
Remarks.—Although comparative material is not available at this writing, descriptions in the literature indicate that this single adult female belongs to the coastal form, G. s. zaphaeus. In both color and in cranial and external measurements, this specimen appears to agree closely with descriptions given by Howell (1918:43) and by Cowan (1937:78 and 82), although its measurements are also in the range of those given for G. s. alpinus by Cowan (loc. cit.). It may be pointed out that Swarth (1936:402) regarded a specimen from 15 miles south of Atlin, British Columbia, as G. s. alpinus.
Measurements of Alcorn's specimen are as follows: total length, 331; tail, 143; hind foot, 42; ear from notch, 23; greatest length of skull, 41.7; zygomatic breadth, 25.7; mastoid breadth, 21.7; length of nasals, 12.2; length maxillary tooth-row, 8.2; interorbital constriction, 8.2; and postorbital constriction, 9.0.
Castor canadensis sagittatus Benson
Beaver
Castor canadensis sagittatus Benson, Jour. Mamm., 14:320, November 13, 1933. (Type from Indianpoint Creek, 3200 ft., 16 mi. NE Barkerville, British Columbia.)
Specimens examined.—Two from British Columbia: Fort Halkett, N side Liard River.
Remarks.—Two beaver skulls obtained by Alcorn from trapper Johnny Pie appear to be of this subspecies. Anderson (1947:133) records this subspecies from the Liard River, in the area from which these specimens were taken. The trapper told Alcorn that he shot these two beavers in the winter of 1947-48 and hung the skulls in a tree.