First lesson in zoology : adapted for use in schools . in the cod-fishery. It abounds most on theGrand Banks of ^Newfoundland. The breeding habits ofthe haddock, hake, and pollock are probably like those ofthe cod. At the head of the TeUocephali stand the flounders, hali-but, and solesj which eire an extremelymodified typeof the 164 FIRST LESSONS IN ZOOLOGY. order. In these fishes the body is very unsymmetrical, thefish virtually swimming on one side, the eyes being on theupper side of the head. The upper side is colored dark,due, as in other fishes, to pigment-cells; the lower side iscolorles
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First lesson in zoology : adapted for use in schools . in the cod-fishery. It abounds most on theGrand Banks of ^Newfoundland. The breeding habits ofthe haddock, hake, and pollock are probably like those ofthe cod. At the head of the TeUocephali stand the flounders, hali-but, and solesj which eire an extremelymodified typeof the 164 FIRST LESSONS IN ZOOLOGY. order. In these fishes the body is very unsymmetrical, thefish virtually swimming on one side, the eyes being on theupper side of the head. The upper side is colored dark, due, as in other fishes, to pigment-cells; the lower side iscolorless, the pigment-cells being undeTeloped. When firsthatched the body of the flounder is symmetrical, and inform is somewhat cylindrical, like the young of other fishes, swimming vertically as they do, and with pigment-ceUs onthe under side of the body. The flounder is not bom withthe eyes on the same side of the head, but one eye gradu-ally passes from the blind to the colored side ; the transferof the eye from the blind side to the colored side occurs. Fio. 168.—The Codfish, Gadus morrhua. very early in life, while all the facial bones of the skull arestill cartilaginous, long before they become hard and ossi-fied, i.e., when the flounder {Plaqusia) is twenty-five milli-metres (one inch) long. Young flounders, when less thantwo inches in length, are remarkably active compared withthe adults, darting rapidly through the water after theirfood, which consists principally of larval, surface-swim-ming crustaceans, etc. The common flounder from NovaScotia to Cape Hatteras is Pseiidopleuro7iectes Americanus.The Anglers.—The type of the order Pediculati is thegoose-flsh. The name was given to the group from thelong slender bones supporting the pectoral fins. The gill- TEE BONY FISHES. 165 openings are small and placed in the axils of the pectoralfins. Lophius piscatofius, the goose-fish or angler (Fig.169) has an enormous mouth, and swallows fishes nearly aslarge as itself. Its eggs