[mMcmuRRICcCH] PLANKTON OF BRITISH COLUMBIA COAST 81 
other stations along the Vancouver coast and have also been recorded 
by Thompson as occurring at Port Townsend. 
Two Amphipodan species occurred represented by three examples, 
which my colleague, Dr. A. G. Huntsman, has kindly examined for 
me. He reports that two of the examples belong to Hyperoche sp ?, 
probably closely related to H. Kroeyeri Sars, though the exact deter- 
mination of the species cannot be ascertained until more mature exam- 
ples are obtained. The other form, represented by a single small 
female, is probably to be referred to Parathemisto japonica. 
Of the higher Crustacea, a number of larval forms were obtained, 
these including a small number of Calyptopis larvæ, to whose parentage 
no clue was obtained, no adult Schizopods being captured. Of 
Brachyuran larve, a late Megalopa stage was observed and also a 
number of examples of a Porcellanid Zoea, readily recognizable as 
such by the exceedingly long rostral spine. 
3. The third patch of “brown water’’ examined was encountered 
about 314 miles off Amphitrite Point, Vancouver Island. It contained 
a much greater variety of protophytic forms than was observed in the 
collection just described, and in addition to the same species of Cos- 
cinodiscus, C. nobilis, a number of other diatoms occurred, such as 
Diatoma elongatum in considerable quantity and species of Nitschia 
and Synedra. A Thalassiosira, perhaps 7. gravida Gran., was present 
in small numbers, a Melosira in much greater abundance and two 
species of Chaetoceras. One of the forms belonging to this last genus 
is C. decipiens Cleve, characterized by the cells being broadly oblong 
in front view, the foramina almost slit-like and slightly constricted in 
the middle, the chromatophores numerous and scattered through the 
cell, though frequently more or less massed together, and the sete 
of each pair both projecting in the sagittal plane. The other species 
is probably C. constrictum Gran., although the absence of examples 
with spores made the distinction from C. laciniosum Schutt a little 
uncertain. The cells were quadrate in front view, the foramina 
concave, lanceolate or in some cases almost oval, the sutures very 
distinct; the chromatophores, two in number, lay close to the valves, 
and one seta of each pair projected in the sagittal plane while the other 
was curved so as to lie in the transverse plane. A few examples of 
Bacteriastrum furcatum Shad. were also observed. Two species of 
Rhizosolenia, R. setigera Bright and R. alata Bright. occurred in small 
numbers as well as examples of a large Biddulphia, possibly a variety 
of B. aurita Lyngb., noticeable on account of the length of the angular 
processes of the valves, the mound-like projection between them sur- 
mounted by two strong filaments of attachment, and the large number 
of small chromatophores scattered through the cell. Finally a single 
