296 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Paracalanus shows a minimum in spring 1 and early 

 summer and a maximum later in the autumn. 



Cladocera. 



The numbers for this group were again low, : as they 

 were in 1913. It is obvious from the following histories 

 that our two species of Cladocera maintain their character 

 as a summer group. 



Fodon intermedium first appeared in the Bay 

 gatherings on April 27th, and was usually present from 

 that time onwards to October 18th. It was most abundant 

 at the end of May and beginning of June (850 on May 

 28th was the maximum), and again in August (e.g., 560 

 on the 13th). 



Evadne nordmanni made its first appearance in the 

 Bay on April 9th, reached its maximum of 1,370 on 

 May 28th, was present in varying quantities up to 

 August 6th, and again from September 3rd to 19th, and 

 on October 23rd. 



Sagitta. 



Sagitta bipunetata was again represented in practi- 

 cally every haul of our nets, but the numbers were lower 

 than usual. On only twelve occasions throughout the 

 year in our "official " hauls did the numbers rise to over 

 100, and the maximum (on May 28th) was only 400. 



It ought to be noted, however, that while the 

 ordinary surface gatherings taken across Port Erin Bay 

 in spring contained only small numbers of Sagitta, we 

 found that by using weighted nets in a deeper zone of 

 water outside larger hauls of Sagitta were obtained. We 

 had found the same on previous occasions, and it is 

 evident that sometimes most of the Sagitta are below the 

 surface. 



