174 University of California Publications in Zoology. [VoL-> 
low tide, thus leaving extensive tide flats. There is consider- 
able level land surrounding the harbor, and to the west and 
southwest there are several high mountains. 
The principal timber is hemlock, but there is some fir, and 
in the hills there are yellow cedar and a species of pine. Most 
of the pines grow in what may be called ‘‘parks.’’ These are 
tracts of more open country, the trees being fewer and smaller. 
The parks are carpeted with moss like all the region; but in 
some places a kind of grass grows among the moss, even predom- 
inating here and there. If level, these parks are swampy, but 
on sloping ground they are comparatively dry. There appear 
to be species of plants in the parks not met with elsewhere, such 
as the low cranberry, but their erowth was not far enough ad- 
vanced to render them readily recognizable. Birds are here 
more numerous than elsewhere, except on the beaches. For land 
work Mole Harbor proved a better collecting ground than Wind- 
fall Harbor. Base camp was maintained at Mole Harbor from 
May 19 to June 10. 
Alexander, Beaver, and Hasselborg Lakes, Admiralty Island. 
—Three miles west of Mole Harbor a chain of three large lakes 
begins, with outlying small ponds; this system drains into a large 
stream flowing across Admiralty Island and emptying into Kootz- 
nahoo Inlet. The location of these lakes was ascertained from a 
prospector named Allen E. Hasselborg. The services of this man 
were secured as guide and he remained with the party until 
August. As the interior of Admiralty Island appears to be 
wholly unexplored, we gave to the lakes the names here used; 
the accompanying map (pl. 25) shows their approximate size and 
location. Alexander and Beaver lakes are practically one, being 
separated only by a narrow, shallow channel. The first is about 
two miles long by one and one-half to three-quarters of a mile 
wide. The second is about one mile long by half a mile wide. 
A thirty-foot waterfall and a short, rapid stream connects Beaver 
Lake with the third of the series, Hasselbore Lake. This is ten 
miles long with an average width of a mile or more. The region 
proved notable because of the finding there of the beaver, hith- 
erto unrecorded from any of the islands of southeastern Alaska. 
Bird-lfe was also unusually plentiful. Extended visits were 
