214 



TRAXSACTIOXS LIVERPOOL BIOLOGICAL SOCIETY. 



It must be remembered that the above figures are 

 ouly the monthly averages, per haul, aiid that many of 

 the individual hauls in each month were much larger, as 

 we shall show below. Anomalocera , as it appears in the 

 above tabl(\ would not be worthy of record were it not 

 that it lias assumed more importance in other years, and 

 may do so again, and consequently it is well to preserve 

 this year's record for comparison. 



If we arrange the six most abundant of these species 



of Co])e])oda in the order of their abundan(;e with their 



total numbers — and add the totals for tlie two previous 



years — they are as follows : — 



1911. 1!»10. 1909. 



Oithona similis 1,155,108 872,()78 465,066 



Pseudocalanus elongatiis 365,983 368,326 309,973 



Paracalanus parvus 351,088 217.633 54,120 



Acartia clausi 323.633 340.631 63,373 



Temora longicornis 10(i.359 147, Oi:? 62,()59 



Calanus helgolandicus 5,843 15,481 21,412 



This list shows that the only difference in the order 

 is that this year Paracalaiivs yarviiH comes above Acartia 

 clausi, while it was below in 1910 ami 1901). The 



