332 University of California Publications in Zoology. \Vou-9 
Elrington Island is very similar to Hoodoo in rock formation 
and forest conditions. It is of about the same height, leneth, 
and trend as Hoodoo but is much narrower and consequently 
its sides are very much more precipitous. 
PORT NELL JUAN. 
Port Nell Juan is one of the longest and crookedest inlets 
in the Sound. It pierces a glacial region, one of rugged topog- 
raphy. The numerous angles of the inlet are made by the sharp 
angles of the mountain ranges. The beds of the ravines which 
separate these ridges are occupied by glaciers. Most of these 
enter the inlet and give off at their mouths small icebergs. 
Timber-line does not extend up the slopes more than 1000 feet 
except at the north on southern exposures. The greater part 
of the inlet presents an aretic appearance, and its ranges harbor 
ereat snow fields which supply the glaciers found in all the 
ravines and canons of the region. At the head of the Port is 
a wide, flat valley which divides into two arms a few miles 
inland. Two large streams enter the bay here. In appearance 
this region resembles Cordova Bay. The wide border of mud- 
flats is sueceeded by a considerable exposure of grassy meadow 
in which a few large ponds oceur. This meadow is fringed by 
a growth of willow which gives way in a few rods to groves of 
cottonwoods. These in turn are held in check by heavy forests 
of spruce throughout the greater part of the valley, covering 
all the drier and higher portions. Tongues of willow, alder, 
and cottonwood trees extend up the stream margins. The gray- 
ereen water of the Port, which holds much glacial silt in suspen- 
sion, is apparently injurious to marine life. This lack of marine 
forms may account for the corresponding lack of sea-birds. 
GRAFTON ISLAND. 
Grafton Island is a small, low island lying a few miles south 
of Port Nell Juan and very close to Point Newell. It is sepa- 
ated from the mainland by a narrow, shallow channel. The 
ereatest diameter of the whole mass is only about half a mile. 
It is uniformly forested with rather small trees of Sitka spruce 
and mountain and western hemlock. Near the lee shore several 
