PLANKTON OF TITE GULF OF MAINE 
161 
outnumbering it off Shelburne (station 10294) and on Browns Bank (station 10296) 
during that month in 1915. 
Station 
Species present 
Station 
Species present 
20044 
Compressa. 
Do. 
Compressa and bispinosa. 
Juveniles. 
Compressa and bispinosa. 
Compressa. 
Compressa and bispinosa. 
Do. 
Juveniles. 
Compressa and bispinosa. 
Juveniles. 
Compressa. 
20074 
Compressa and bispinosa. 
Do. 
Compressa. 
Do. 
Do. 
Do. 
Juveniles. 
Do. 
Compressa. 
Compressa and bispinosa. 
Compressa. 
Compressa and bispinosa. 
20045 
20075 
20046 
20077 
20050 
20079 
20052 
20087. 
20055 
20095 
20057 
20102 
20065 
20104 
20067 
20112 
20068 
20113 
20071 
20114 . 
20072 
20129 
With the advance of summer the ratio of bispinosa to compressa increases. 
Thus, in July, 1914, bispinosa outnumbered the latter on the southern part of Georges 
Bank (stations 10216 and 10223) and on Browns Bank (station 10228) and about 
equalled it on the northwest part of Georges Bank (station 10215) and in the eastern 
channel (station 10227) ; but compressa was still the dominant member of the pair 
off Massachusetts Bay (station 10213), in the southeastern part of the basin of the 
gulf (station 10225), over the northeastern edge of Georges Bank (station 10226), 
along the continental edge off the southeast and southwest slopes of Georges Bank 
(stations 10220 and 10218), and abreast of Shelburne, Nova Scotia (station 10233). 
In August of that year bispinosa was the dominant member of the pair near 
Cape Sable (station 10243) and in the eastern side of the basin (stations 10245 and 
10249). The two species were about equal off Mount Desert and Penobscot Bay 
(stations 10248 and 10250). In the deep water off Cape Ann (station 10254) com - 
pressa was the more numerous at the surface, but bispinosa predominated in the 
haul from 225-0 meters. Compressa still dominated at the mouth of Massachusetts 
Bay and in the south central parts of the basin (stations 10253, 10255, and 10256), 
but bispinosa was much the more numerous of the two at two stations on the conti- 
nental shelf off Marthas Vineyard at this time (stations 10258 and 10259), and while 
it dominated at one station at the continental edge (station 10260), compressa out- 
numbered it at another station a few miles farther out (station 10261). 
Bispinosa is not so important, relatively, in the inner parts of the gulf every 
summer, for in 1913 compressa outnumbered it at all the August stations east of 
Cape Cod and north of Georges Bank, though bispinosa was more plentiful then 
than it had been a month previous (we have no autumn records for that year in 
the gulf), and with the same center of abundance as in 1914 — that is, the central 
and eastern parts of the deep basin. Bispinosa outnumbered compressa in Massa- 
chusetts Bay, off Cape Cod, and locally south of Marthas Vineyard in October, 
1915 (stations 10258 to 10267); and in the first week of November, 1916, it again 
predominated off Cape Cod (station 10404) but was detected at only two of five 
stations farther north in the gulf at this time, whereas compressa was at all of them. 
Compressa was also the only Euthemisto noted close to land near Marthas Vineyard 
