MARINE BIOLOGICAL STATION ON PUFFIN ISLAND. 25 



samples of the bottom deposits, and this was frequently in 

 use during the cruise. A new species of Copepod, which 

 was obtained in this manner from muddy sand dredged in 

 Port Erin Bay at a depth of five fathoms, has been named 

 Jonesiella hycence, in honour of the old gunboat. 



In the afternoon the "Hyaena" made two runs from 

 Port Erin southwards to the Calf, dredging homewards 

 with the wind, and got two excellent hauls, which 

 contained, amongst other things, the rare coral -hke 

 Sarcodictijon, the flat pentagonal starfish Palviipes, the 

 remarkable parasitic sea-anemone Adamsia, which is 

 always found in company with a particular hermit crab 

 {Pagiirus prideauxii), Echinocyamus pusillus, Stichaster 

 roseus, Porania pulvillus, Lyonsia norvegica, Ascidia 

 venosa (with Leucothoe spinicarpa in the branchial sac), a 

 sponge {Esperella floreu7n) new to the district, and various 

 rare Crustacea and mollusca. 



Electric Light Experiments. 



After dark, on two consecutive nights, the electric light 

 was used for a couple of hours in collecting bottom and 

 surface free-swimming animals around the ship, in much 

 the same way as during the previous summer's cruise. 



The first application of this important method of 

 collecting appears to have been made by the United 

 States Fish Commission in 1884, on board the steamer 

 ''Albatross." On that occasion an arc lamp was merely 

 suspended above the surface of the water, and it was 

 found to attract Amphipods, Squids, and young fish to 

 the surface. In the following year the same naturalists 

 experimented further by lowering an Edison incandescent 

 lamp into the water, with similar good results. The Fish 

 Commission do not give any details in regard to the 



