158 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



surface material was found to be 8 cc., that taken by the 

 bottom tow-net 20 cc., showing the latter to be 2 j times 

 as much in quantity as the former. 



Table showing Plankton taken by surface and bottom 

 (33 faths.) tow-nets, January 29th, 1899 : — 



c6 



O 

 ft 

 CD 

 ft 

 O 



Q 



fCalanus finmarchicus - - 

 Pseudocalanus elongatus - 

 Brady idius armatus - - - 

 Gentropages hamatus - - 

 Temora longicomis - - - 

 Metridia long a - - - - 

 Acartia clausii - - - - 

 Candace pectinata - - - 

 Oithona spinifrons - - - 

 Euterpe acutifrons - - - 



[Longipedia coronata - - 



Diatomacese 



Foraminifera - - - - - 



Medusae 



Ctenophora. Pleurobrachia 

 Chsetognathge. Sagitta 

 Crustacea, Amphipoda - - 

 ,, larval Cirripedes 

 ,, ,, Schizopods 



Mollusca, larval - - - - 



Fish ova 



Annelids, larval - - - - 



Surf. Townet 



Bot 



Townet 



F 





A 



A 





A 



S 



C 







F 





F 



A 





C 



C 





r 

 F 



c 

 s 



A 

 F 

 F 



S 



A=abundant. C=common. F=few. S= scarce. 



An analysis of the above table shows that four species 

 of Copepoda were common to surface and bottom, viz., 

 Galanus finmarchicus, Pseudocalanus elongatus, Acartia 

 clausii, and Oithona spinifrons. In proportion to the 



