52 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



1 2 3 



Nonionina asterizans, F. and M., sp f 



depressula, W. and J., sp c 



pauperata, B. and W 



scapha, F. and M., sp 



turgida, Will., sp vr 



umbilicatula, Mont., sp 



Polystomella arctica, P. and J 



crispa, Linn,, sp f 



decipiens, Costa 



macella, F. and M., sp vr 



striato -punctata, F. and M., sp. ... vc 

 striate -punctata, var. Selseyensis, 



H.-A. and E 



Operculina ammonoides, Gron., sp .. 1 



Fish and Plankton. 



One of the points to which, as usual, we paid particular 

 attention was the minute floating life, or plankton, of the sea, 

 and especially any evidence of its relation to the presence or 

 absence of useful fishes. 



Some observations we made on the abundance of the 

 large Copepod Calanus finmarchicus (see fig. 14), near Tober- 



vr 





c 



c 



r 



r 

 vr 



1 





vr 



c 





vc 



f 



f 

 vr 



c 



vr 



vr 



i 



f 



vr 







vr 



r 



vr 



vr 



i 



i 



f 





i 



Fig. 14. — Copepod Plankton consisting wholly of Calanus finmarchicus. 



mory, Mull, at an early period of the cruise — -and which were 

 much discussed on board — led to the following letter being 

 sent to " Nature ".* : — 



* Nature for July 17th, 1913, p. 504 ; " Mackerel and Calanus." 



