50 



BULLETIN OF THE BUREAU OF FISHEEIES 



(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 Euchreta 

 community detected among a great abundance of large Calanus Jinmarchicus and 

 Calanus liyperboreus (p. 304) were a few Eucheeta 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 chaetognaths. 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, Station 20055, 



southeast 



part, 175 



meters 



east basin, 



180 to 140 



meters 



Station 20079, 



Fundy Deep, 



180 meters 



Calanus finmarchicus .. 



Metridia lucens 



Euchfeta norvegica 



Meganyctiphanes norvegica. 



Thysanoessa i nermis 



Pasiphsea 



Euthemisto compressa 



Euthemisto bispinosa 



Tomopteris catharina 



Sagitta elegans... 



Sagitta lyra 



Eukrohnia hamata 



Limacina retroversa.. 



Clione limacina 



Beroe' _ _ 



Aglantha 



D 

 X 



M 

 11 



X 

 X 

 X 



1 

 1 

 1 



X 



M 



D 

 X 

 X 



2 



1 

 1 

 1 



M 



X 



"x" 



12 

 X 



X 

 X 

 1 

 X 



X 

 X 

 M 



22 

 X 



12 



1 



1 



1 

 X 



' 1 



20+ 



> 1 

 l 1 



1 In open-net haul from 200 meters. 



Occurrence of characteristic animals in the Eastern Basin, various localities and months 



[D, dominant; M, many; X, occurrence] 



1 For further lists of the copepods see p 297. 



