61 



generally distributed ; this was probably due to the state of the 

 sea, for on the 12th September there was a heavy swell due to a 

 strong north-east wind on the 11th. 



Acartia clausi, Giesbrecht. This species is one of our commonest 

 copepods and in July, August, and September, together with Pseu- 

 docalanus elongatus, formed the greater bulk of the surface catches. 



Acartia longiremis (Lilljeborg). Another common form, but 

 rarely occurring in such numbers as the preceding species ; was 

 found in June at stations 3 and 4 to be by far the most abundant 

 copepod in the samples. 



Oithona similis, Claus. Was present from May to October. 

 It was very plentiful in July at stations 7 and 8, where it was taken 

 in large numbers. 



Other copepods occasionally taken were Longipedia scotti, G. 0. 

 Sars, Alteutha interrupta (Goodsir), Eupelte purpurocineta (Norman), 

 Rhynchothalestris rufocincta (Norman), Dactylopusia tisboides (Claus), 

 and Cyclopicera gracilicauda, Brady. The commonest of these 

 were Dactylopusia tisboides and Longipedia scotti, there being several 

 of the latter in the September catches from stations 5 and 6. 



Cladocera. 



Evadne nordmanni, S. Loven. Was taken in every month 

 except October. In May it was only obtained in two catches ; in 

 June at station 8 it was present in very large numbers, and in July 

 it was generally distributed, and, as a rule, occurred in fairly large 

 numbers. The August and September samples contain it, but only 

 in small numbers. 



Podon polypliemoides (Leuckart). This form appeared first in 

 the July samples, but always in small numbers. One or two were 

 found also in August. 



Sagitta. 

 Sagitta hi punctata (Quoy and Gaimard). Only odd individuals 

 were present in the May and June catches. In July and August 

 there was a slight increase in numbers, the August catches for 

 stations 8 and 9 yielding fairly large numbers. In September at 

 stations 7 and 8 large numbers of adult specimens occurred, and 

 were followed in October by large catches of young forms at most 

 of the stations. 



