320 TRANSACTIONS LIVERPOO!, BIOLOGICAL SOCIETY. 
Niarbyl on April 20th, shows what we consider to be the 
usual proportion between the catches taken by the 
different nets—the two surface nets giving about 4 c.c. 
each, the weight net about 12 c.c. and the shear net about 
20 c.c., while the Hensen and Nansen vertical hauls give 
about 1 c.c. each, the Nansen rather more than the 
Hensen. On looking at the constitution of the catches, it 
is interesting to find how closely the numbers of the 
individual species in most cases correspond in the two 
surface hauls, being in quite a number of cases absolutely 
identical. Then, again, the Hensen and the Nansen hauls 
correspond fairly well, amounting to absolute identity in 
the number of Copepoda. The increase in quantity in the 
weight net is due in the main to the greater number of 
Copepoda caught, and to a swarm of Mvadne which this 
net alone seems to have encountered. The contrast 
between the shear and the other nets is typical, all the 
smaller organisms being absent or represented by a few 
retained accidentally, while the bulk of the gathering is 
due to such larger things as Medusae, Sagitta, Larval 
Polychaeta, Crabs and Shrimps, along with a few of the 
larger Copepoda and some post-larval fishes. The shear 
net also caught most of the fish eggs, the total being 133, 
as against 20 taken by the surface net which caught most, 
and the same number in the weight net. 
Three days later we returned to the same spot, and 
worked the same set. of nets with very much the same 
results, the numbers being :—Surface nets, 4 and 3 c.c.; 
weight net, 5 c.c.; shear net, 19 c.c.; Hensen, Oro cieae 
and Nansen, 1 c.c. The chief difference here is that the 
weight net caught less compared with the surface and 
the vertical nets. Of course, the hauls in the two days 
differ a little in detail; but the striking point is the 
similarity in general character, and sometimes even in the 
