48 
BULLETIN OF THE BUREAU OF FISHERIES 
boreal pteropod Limacina retroversa; and the ctenophores Pleurobrachia and Beroe. 
This also applies to tow-net catches at 12 stations between Cape Cod and Yarmouth 
(Nova Scotia) for the midwinter of 1920 and 1921, listed below. These lists vary 
somewhat from station to station, as is always to be expected, but there is no charac- 
teristic qualitative difference between the western and the eastern stations, the 
Calanus community (and chiefly C. finmarchicus ) dominating the same general 
assemblage of boreal animals as occurs in summer at the localities in question. 
Location, date, and depth of hauls 
Species 1 
Off 
Boston, 
Dec. 29, 1920, 
station 10488, 
15-0 meters 
Off 
Cape Ann, 
Dec. 29, 1920, 
station 10489, 
75-0 meters 
Western 
Basin, 
Dec. 29, 1920, 
station 10490, 
240-0 meters 
Off 
Cape Cod, 
Dec. 30, 1920, 
station 10491, 
125-0 meters 
Off the 
Merrimac, 
Dec. 30, 1920 , 
station 10492, 
20-0 meters 
Off Isles of 
Shoals, 
Dec. 30, 1920, 
station 10493, 
75-0 meters 
Acartia clausi 
X 
X 
x 
x 
x 
Calanus finmarchicus .. 
X 
X 
X 
X 
X 
X 
X 
x 
X 
x 
x 
x 
Metridia longa. 
X 
X 
X 
X 
X 
Metridia lucens 
X 
X 
x 
x 
x 
Centropages typicus 
X 
X 
X 
x 
x 
X 
x 
Thysanoessa longicaudata 
X 
Euthemisto eompressa 
X 
1 
Sagitta elegans 
X 
X 
x 
x 
X 
x 
X 
x 
x 
X 
x 
Clione limacina 
1 
2 
3 
1 
Tomopteris catharina 
1 
X 
X 
x 
x 
1 
Beroe cucumis 
X 
X 
X 
Stephanomia 
X 
X 
X 
x 
x 
Location, date, and depth of hauls 
Species 1 
Off Cape 
Elizabeth, 
Dec. 30, 1920, 
station 10494, 
75-0 meters 
Off Seguin 
Island, 
Dec. 31, 1920, 
station 10495, 
60-0 meters 
Off Matini- 
cus Island, 
Jan. 1, 1921, 
station 10496, 
100-0 meters 
Off Mount 
Desert, 
Jan. 1, 1921, 
station 10497, 
50-0 meters 
Fundy Deep, 
Jan. 4, 1921, 
station 10499, 
150-0 meters 
Off Lurcher 
Shoal, 
Jan. 4, 1921, 
station 10500, 
60-0 meters 
Acartia clausi 
Calanus finmarchicus 
Calanus hyperboreus 
Pseudocalanus elongatus 
Metridia longa.. 
Metridia lucens 
Centropages typicus 
Euchaeta norvegica 
Meganyctiphanes norvegica. 
Thysanoessa inermis 
Thysanoessa longicaudata... 
Thysanoessa raschii 
Euthemisto eompressa 
Euthemisto bispinosa 
Sagitta elegans 
Eukrohnia hamata. 
Limacina retroversa 
Clione limacina 
Tomopteris catharina 
Aglantha digitale 
Pleurobrachia pileus 
Beroe cucumis 
Stephanomia 1 
X 
X 
X 
1 For complete lists of the copepods at these stations see p. 304. 
