336 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Station I. 





Easter. 





No. of Hauls. 



Range in c.e. 



Average 

 Catch. 



1907 



13 

 11 

 19 



2-0 to 77-0 

 0-1 „ 8-0 

 0-4 „ 18-7 



23-2 



1908 



2-0 



1909... 



2-9 







Station I. 



Summer. 



No. of Hauls. 



Range in c.c. 



Average 

 Catch. 



1907 



7 



17 

 6 



0-5 to 4-0 

 0-1 „ 1-0 

 0-3 „ 1-0 



1-7 



1908 



0-5 



1909 



0-6 







Nearly all these results are larger than those obtained 

 with the Hensen net, and the amount credited to Easter, 

 '07, is surprisingly greater than all the others. That 

 figure depends, however, upon a few quite exceptional 

 bauls obtained at the time of the Diatom maximum. If 

 we omit that period the remaining averages range from 

 05 to 2*9. The average of this net for April is about 2*5, 

 and for August about 0*9. For April and summer together 

 the average is about 1*7, as against about 0'7 for the 

 Hensen net. 



The remarks made as to the distribution of the 

 Diatoms, Dinoflagellates and Copepoda throughout the 

 years under the Hensen net apply here also. The Diatoms 

 rise to 17 millions twice, as against 2\ millions in the 

 Hensen net, and the Dinoflagellates to 37 thousand 

 against 2 thousand in the Hensen. In '09 the Dino- 

 flagellates reach 20 thousand in April, while in '08 the 

 highest point is 3,600. The Copepoda, like most other 

 groups, are fewer per haul in '08 than in '07 and '09. 



If it is questionable whether the results of the 

 Hensen and Nansen nets are strictly comparable, it is 



