MARINE BIOLOGICAL STATION AT PORT ERIN. 



51 



September, and only fonr species in the deep collection. 

 On the 12th, eight species of Copepoda were present at 

 the surface and five species at 10 fathoms. Copepoda 

 were the chief constituent in the majority of the collec- 

 tions taken during the cruises of the " Madge " up to 

 September 17th, when this special work came to an end. 

 A week later Professor Herdman returned to Port Erin for 



Pig. XI. — Protozoa and Diatoms (highly magnified). 

 1-3, Ceratium; 5, Nootiluca ; 8-11, Diatoms. 



a short visit, and during that time took six surface tow- 

 nettings from a rowing boat on three consecutive days — 

 September 25th to 27th. Four of the collections were 

 made in Port Erin Bay, one in Bay Fine, on the way to 

 Calf Island, and one in the open sea off Bradda Head. 



