MARINE BIOLOGICAL STATION ON PUFFIN ISLAND. 63 
depressum. This last species is usually found attached to 
the surface of Laminaria and other Alge at the bottom, 
and Pseudocalanus armatus has apparently only been 
found in British seas before at considerable depths in the 
Clyde estuary. Consequently their presence on the surface 
is remarkable, and was, no doubt, caused by the attraction 
of our powerful electric light. 
All the nets were, on this occasion, used in water 
lighted up, the surface nets being in the 6,000 candle- 
power glare, while the bottom nets were further from this 
bright light, but had each their own smaller lamps. All 
gave, so far as we yet know, practically similar results, 
which are markedly different from both the bottom and 
the surface gatherings taken at the same place during the 
previous day. The electric light gatherings contain chiefly 
Schizopoda, Cumacea and Amphipoda, and the Cumacea, 
chiefly adult males of Iphinoe trispinosa, with their long 
slender red bodies and active movements, are the most 
marked feature; they are very abundant, and form a 
conspicuous characteristic in the gathering whenever it is 
transferred from a net into a glass jar. In none of the 
daylight tow-nettings, either bottom or surface, I think, 
was a single cumacean obtained, while every gathering on 
the two nights when we had the electric light going 
contained Cumacea in abundance. There can be little 
doubt that those captured in the surface nets had been 
attracted from the bottom by our brilliant deck lights, 
which had been shining for fully half an hour before the 
nets were put over. 
On the fifth day the “‘Hyzna” started in the morning 
from Port Erin, and arrived at Liverpool soon after 
midnight. A little dredging and tow-netting was done on 
_the way. One good haul was obtained from a stony and 
shelly bottom at about fifteen miles south-east of the 
