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In these two stages the young barnacle drifts about in 
the sea. After passing through stage 2 they fix them- 
selves—the common barnacle to stones, piles, the bottoms 
of boats, &c.; the ship barnacle to the bottoms of 
ships, &c.; and the crab barnacle to various kinds of 
crabs. 
1—Barnacle just hatched. 2—Later stage of the same. 
Magnified about 60 dia. 
These young barnacles are always found in the tow- 
nettings during the early spring, and will be studied. 
Development of the Flounder.—the 
ege of the flounder just before hatching. The newly- 
hatched fish. When it issues from the egg, the little 
flounder is a round fish, hke the newly-hatched cod or 
haddock. When it is about six weeks old the body 
flattens out and the eyes twist round until they both 
appear to be on the same side of the fish. Up to this time 
the little fish swims about in the sea, but when it has 
become a “ flatfish ” it sinks to the bottom. 
