MARINE BIOLOGICAL STATION AT PORT ERIN. 63 
pulley in such a manuer that in a rough sea a few yards 
of line could be let out during the strain of a wave and 
recovered again when slack, so as to keep the pull on the 
net about constant. We also used on occasions the small 
fish-net, or “ yngel-trawl,” of Petersen (fig. 16), which 
Fig. 15. The mouth of the ‘‘ shear-net.”’ 
cor 4 € 
Hig. 16. ‘‘ Yngel-trawl,’’ with ‘‘ otter-boards’’: a, mouth. 
obtained much the same kind of catches as the shear-net. 
During the Haster vacation of 1908 (April 11th to 
29th inclusive) I took 186 gatherings, in 15 working days 
(an average of over 12 per day), which. will serve to 
compare with those taken during the corresponding period 
