94 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
DECEMBER. 
Material: Coarse net, 7; Fine net, 7; Vertical net, 7 = 21 hauls. 
Results : No fish eggs. 
From the above records it will be seen that pelagic eggs 
were present in the plankton of Port Erin Bay for nine months 
out of the twelve. The maximum occurred in March. The 
increase at the beginning was very rapid, rising from 0°83 per 
haul of the coarse net in January to 1064 in March. A 
reduction set in durmg April, which was continued to June. 
A well defined increase took place in July, which was largely 
due to the presence of the eggs of two species of fish. After 
that the pelagic eggs ceased to be conspicuous amongst the 
plankton organisms, and finally disappeared in September. 
The fine nets although catching many fewer eggs show the same 
rise and fall that is revealed by the coarse nets. The hauls 
taken outside the bay indicate that the maximum was rather 
later there than nearer the shore. The coarse net collections 
two and three miles outside in April captured 224-4 egos each 
against 72°7, and the fine nets 49-4 against 27-7 im the bay. 
