64 LIVERPOOL BIOLOGICAL SOCIETY. 
Chicken Rock (depth thirty fathoms), which yielded large 
numbers of polyzoa. These have been examined by 
Mr. Lomas, who tells me that they include Cellaria 
jistulosa (very abundant) and C. senuosa (new to “‘ Fauna’), 
Cellepora dichotoma, Stomatopora major and S. johnstont, 
Tubulipora lobulata and T. flabellaris, and a number of 
common forms. 
At this spot also, it being the deepest water on our 
homeward track, we let the electric lamp down to the 
bottom in a tow-net (see fig. on page 75) twice, and got 
gatherings, consisting mainly of Copepoda, Sagitta, Amphi- 
poda, Zoéas, and other larval forms. 
That free-swimming Crustaceans are attracted to a 
stationary net by the electric light may now, after our 
experiments of 1888 and on this last cruise, be considered 
established beyond doubt; and that the illuminated tow- 
net can be used in at least moderately deep water was 
evident to all who saw the success with which the net 
was worked on board the ‘“‘ Hyena”’ in thirty fathoms. 
The submarine electric light is, therefore, an important 
addition to the collecting methods of the marine biologist, 
and one which ought certainly to come into extensive use 
in the future. It is, of course, only very rarely that a 
vessel like the ‘‘Hyzna,” so fitted up that the electric 
light can be turned on readily at any time to illuminate a 
series of nets, is placed at the use of the biologists, and to 
fit out a boat specially with an engine and dynamo and a 
set of lamps, would be a very expensive matter. I thought 
at one time that storage batteries might serve the 
biologist’s purpose, but on making inquiries in Liverpool 
we found that for even a day’s work a considerable 
number of batteries would have to be taken, and the 
expense would be too great. The plan of sending a 
primary battery down in the net, as in the case of the 
