50 
BULLETIN OF THE BUREAU OF FISHERIES 
(station 10490), and the other from 150 meters in the eastern basin on January 5, 
1921 (station 10502). On the former occasion the only members of the Euchseta 
community detected among a great abundance of large Calanus JinmarcTiicus and 
Calanus Jiyperboreus (p. 304) were a few Euchseta and Eukrohnia; on the latter date the 
whole catch was extremely scanty (not over one-tenth liter) , consisting chiefly of debris 
of the siphonophore genus Stephanomia, with Calanus and other copepods, among 
which there were a few Euchseta, Meganyctiphanes, Thysanoessa inermis, Th. 
longicaudata, Sagitta elegans, pteropods ( Limacina retroversa) , two Euthemisto com- 
pressa, but none of the deep-water chsetognaths. These hauls suggest that a decided 
impoverishment of the deep-water plankton takes place during the autumn, but 
this may have been accidental. The Euchseta community probably persists unal- 
tered in qualitative composition throughout the winter, as widespread over the deep 
trough then as it is in summer, judging from the following catches made with the 
closing net in the central and eastern parts of the basin on March 2 to 3, and in the 
Fundy Deep on March 22, 1920. 
[D, dominant; M, many; X, occurrence] 
Species 
Station 20052, 
central basin, 
160 meters 
Station 20053, 
southeast 
part, 175 
meters 
Station 20055, 
east basin, 
180 to 140 
meters 
Station 20079, 
Fundy Deep, 
180 meters 
Calanus finmarchicus _ 
D 
D 
X 
X 
x 
x 
X 
Euchseta norvegica 
M 
x 
X 
M 
Meganyctiphanes norvegica _ 
11 
2 
2 
22 
Thysanoessa inermis 
1 
X 
Pasiphsea. _ 
1 
1 
>2 
Euthemisto compressa 1 
1 
1 
1 
1 
1 
1 
Tomopteris catharina 
X 
X 
1 
M 
M 
X 
X 
Sagitta lvra 
* 
1 
1 1 
Eukrohnia hamata 
12 
X 
20+ 
X 
X 
2 
i 1 
Beroe 
x 
i 
1 
i 1 
Aglantha 
2 
1 In open-net haul from 200 meters. 
Occurrence of characteristic animals in the Eastern Basin, various localities and months 1 
[D, dominant; M, many; X, occurrence] 
Location, date, and depth of hauls 
Species 
Station 
20081, 
140-0 
meters, 
Mar. 22, 
1920 
Station 
20086, 
150-0 
meters, 
Mar. 23, 
1920 
Station 
20112, 
200-0 
meters, 
Apr. 17, 
1920 
Station 
10270, 
150-0 
meters, 
May 0, 
1920 
Station 
10288, 
200-0 
meters, 
June 19, 
1915 
Station 
10246, 
150-0 
meters, 
Aug. 12, 
1914 
Station 
10093, 
170-0 
meters, 
Aug. 12, 
1913 
Station 
10310, 
175-0 
meters, 
Sept. 2, 
1915 
Stations 
10500 and 
10502, 
150-0 
meters, 
Jan. 4 and 
5, 1921 
Calanus finmarchicus. 
D 
D 
D 
D 
D 
D 
D 
D 
D 
Metridia lucens 
x 
x 
x 
x 
Euchseta norvegica 
X 
X 
X 
D 
M 
M 
X 
M 
X 
Meganyctiphanes norvegica 
D 
D 
x 
M 
X 
M 
x 
X 
Thysanoessa, various species 
X 
x 
x 
X 
x 
X 
X 
x 
Pasiphsea 
X 
X 
X 
Euthemisto compressa 
X 
x 
x 
x 
x 
Euthemisto bispinosa 
X 
X 
X 
Tomopteris catharina 
x 
X 
X 
X 
x 
x 
Sagitta elegans 
x 
X 
x 
x 
x 
x 
x 
x 
x 
x 
X 
Eukrohnia hamata 
x 
x 
x 
x 
X 
X 
X 
Limacina retroversa. 
x 
X 
x 
X 
x 
x 
x 
x 
x 
x 
x 
x 
X 
X 
x 
x 
1 For further lists of the copepods see p 297 
