1909] The 1907 Alexander Alaska Expedition. 259 
the mainland and on the small islands near the shore. Judging 
from the notes of the collectors this species is without the 
mound-building habits of the closely allied sitkensis. 
Microtus macrurus Merriam. Long-tailed Vole. 
Four specimens were secured at Windfall Harbor, Admir- 
alty Island, and one at Thomas Bay on the mainland. This is 
a wide-ranging form and covers most of the coast and islands 
of southeastern Alaska. Jt has not, however, been secured on 
Baranof Island. 
Evotomys dawsoni Merriam. Dawson Red-backed Mouse. 
A series of fourteen are in the collection from Glacier Bay. 
These agree well with dawsoni in coloration, but their skulls 
average slightly larger than topotypes. The majority of the 
specimens were secured by Stephens in alder thickets at Bart- 
lett Cove. <A single additional specimen was taken by Dixon at 
Coppermine Cove. 
Evotomys wrangeli Bailey. Wrangell Red-backed Mouse. 
Two immature specimens were taken at Helm Bay, but as 
these show neither adult coloration or skull characters their 
reference to this form is somewhat doubtful. 
Erethizon epixanthus nigrescens Allen. Dusky Porcupine. 
An adult specimen is in the collection from Thomas Bay. 
This skin which is very dark agrees well in coloration with 
Allen’s description and shows decided differences on compar- 
ison with skins from Prince William Sound, Alaska. The skull, 
however, is not distinguishable from a large series from the 
Kenai Peninsula except in the coloration of the incisors which 
are buffy yellow instead of ochraceous rufous. 
Lutreola vison nesolestes, new subspecies. Island Mink. 
Tyre from Windfall Harbor, Admiralty Island, Alaska; 
adult male, No. 201, Univ. Cal. Mus. Vert. Zool.; collected by 
Annie M. Alexander; April 28th, 1907; orig. No. 14. 
