262 University of California Publications in Zoology. [Vou.> 
fall to the white of winter. The skulls agree well in characters 
with the topotype series. These specimens, however, are not 
comparable as to coloration as they represent different pelages 
than the topotypes. 
Two somewhat immature specimens were secured at Hawk 
Inlet, Admiralty Island. These agree fairly well in coloration 
and skull characters with specimens of haidarwm but as there 
is no alascensis material comparable to these in age I have hesi- 
tated about assigning them to haidarwm on account of their 
eeographie position. The material representing both haidarwm 
and alascensis in the Biological Survey collection is not exten- 
sive enough to determine the relation these two forms bear to 
each other. 
Lutra canadensis periclyzomae Elliot. Sea-girt Otter. 
The material in the collection consists of two adult male 
specimens, one taken at Saook Bay, Baranof Island, and the 
other at Windfall Harbor, Admiralty Island. After working 
over a large series of skulls from the Pacific Coast to determine 
the status of this form, the only reliable character was found to 
be the extreme flatness of the audital bullae. This character 
is dominant in the skulls of all the otters of the whole coast and 
coast islands of British Columbia north at least to Prince Wil- 
liam Sound, Alaska. Skulls of this form in the Biological 
Survey collection from the Queen Charlotte, Vancouver, Prince 
of Wales and Montague islands have been examined. Skulls 
from Washington, California and from the Yukon Basin have 
the larger bullae of pacifica and canadensis respectively. The 
largest skulls in the collection are from Prince of Wales Island, 
where this form doubtless reaches its maximum size. Besides 
several very large adult skulls from this island there is in the 
collection an immature one which exceeds all others in size and 
massiveness. 
Sorex personatus streatori Merriam. Streator Shrew. 
A series of fifty-six are in the collection from Baranof, Chi- 
chagof and Admiralty islands and from Glacier, Thomas and 
Helm bays of the mainland. This widespread form was secured 
