62 



Ctenophores. 



In June thousands of Beroe, together with Less ue una, Pleuro- 

 brachia and Mertensia were to be seen in the waters of the district, 

 and with them were often countless numbers of Amelia and Cyanea. 

 They were as a rule most numerous where the tides meet, and often 

 formed long lines some distance from the shore. They do not, 

 except Pleurobrachia, occur in any number in the catches, as such 

 localities were missed when taking the samples. They were noticed 

 in most abundance off Cullercoats, in Druridge Ba}^ and in the 

 tk Kettle,"' an anchorage between the Inner Fame and the Wide 

 Opens. 



Pleurobrachia was also taken in October. 

 Ceratium. 



No attempt has been made to distinguish the different species 

 of Ceratium. Under Ceratium tripos are included all Euceratium 

 forms ; Ceratium f urea includes the Biceratium forms, and probably 

 the young of Ceratium tripos, and Ceratium fusus the Amphi- 

 ceratium forms. Ceratium was generally most abundant in the 

 offshore waters, and was found every month, being very common 

 from July to October. 



Peridinium. 

 Peridinium appeared in June, and obtained its maximum in July. 

 In August and September it was generally present in small numbers, 

 and only occasionally in October. The most important species is 

 probably P. divergens. 



Diatoms. 



Diatoms were not found generally in any quantity, except in 

 September. In May, at station 3, Rhizosolenia, Chaetoceros and 

 Biddulphia were found in fair numbers, and in June, at station 9, 

 Rhizosolenia occurred in large numbers. 



In September, when large quantities of diatoms were taken, the 

 chief forms were Rhizosolenia delicatula and R. styliformis, with 

 Chaetoceros, Eucampia, Coscinodiscus and Biddulphia. 



Larval Forms. 



Larval forms of invertebrates were found in every month, and 

 sometimes added considerably to the bulk of the catches. 



Echinoderm larvae were present every month, but never in 

 any great numbers, except in July, when at station 8 many were 

 taken. In the catches for the other months they occurred but 

 sparingly. 



