Postelsia 265 
is generally to be found along with Cymathere 
in situations where the surge is weak but is 
not quite so much restricted to quiet waters as 
is Cymathere. From this position, close to 
the emergent zone, it extends out an unknown 
distance into deep water where wave action is 
a minimum. That it grows out in very deep 
water is rather confidently inferred from the 
circumstances of its appearance at Port Renfrew. 
The shallow water specimens collected in vari- 
ous tide-pools and recesses were all compara- 
tively short and badly eroded away so that 
even the smallest specimens found were quite 
imperfect. 
Besides these, others were found in the wash 
at ‘‘Dictyoneuron Cove” which bore a very 
different character—-so different that it seems 
advisable to distinguish them as a variety of 
the typical form which, on account of the char- 
acter given below, may be designated Renjrewia 
parvula perlonga var. nov. Though truncated 
by wear at the tips, the plants all maintained a 
much greater length than the typical forms, 
often- more than a meter, while the longest 
