1909] The 1907 Alexander Alaska Expedition. 247 
Four new forms, Castor canadensis phaeus, Microtus admir- 
altiae and Lutreola vison nesolestes, from Admiralty Island, and 
Marmota vigilis from Glacier Bay, have been detected in the 
material and are herewith described. 
The writer wishes to express his obligation to Dr. C. Hart 
Merriam, chief of the Biological Survey, for the privileges ex- 
tended him with the collections under his charge and for his 
friendly interest in the work. To the staff of the Biological 
Survey he is indebted for much aid of various kinds in his com- 
parisons with the extensive series in the Survey collection. He 
is particularly under obligations to Mr. W. H. Osgood for much 
assistance and many favors. 
Odocoileus columbianus sitkensis Merriam. Sitka Deer. 
Two young females from Baranof Island are in the collection. 
Deer were found fairly common on Admiralty, Baranof and 
Chichagof islands. Admiralty and Chichagof mark their ex- 
treme northern range on the coast islands. They reach on the 
mainland about the same latitude. Their northward extension 
is apparently checked by the severity of the climate, the deer at 
these latitudes succumbing to the cold in large numbers during 
severe winters. 
On Admiralty Island Stephens reports them as common at 
Mole and Windfall harbors. At Hawk Inlet a doe with two 
fawns was seen by Hasselbore. Dixon has the following notes 
on the deer about Alexander, Hasselborg and Beaver lakes: 
“Deer were quite common about the lakes. We saw many 
carcasses of deer that had died during the previous winter, which 
had been an exceptionally hard one on deer as the snow came 
early and stayed late. Most of the dead deer that we saw were 
bucks. The greater mortality among bucks is due to the: lean 
condition in which they are left after the rutting season. They 
become fat in July, and about the first of August their horns 
are out of the velvet, at which time they begin fighting. Then 
the rutting season comes on and they keep chasing about, get- 
ting poorer and poorer all the time. When winter comes it finds 
them comparatively weak, very different from the sleek, fat 
condition of August. The does drop their fawns in May, as a 
