FISHES. 339 
A great number of young fish are sent from this establishment 
to the rivers and lakes of France, as well as to neighbouring 
countries. 
EGGS OF THE BLACK=-MOUTHED DOG-FISH. 
(Squalus Catulus.) 
The fish-ponds of Concarneau are for the rearing of salt-water 
fish. There are some reservoirs in which the fish are preserved, 
and others still larger for rearing crustaceans, which seems to be the 
most profitable part of the undertaking. In the aquariums, every 
Wi 
