Première leçon de zoologie : adapté pour utilisation dans les écoles . ecunner Tautogo (-labrus adspersus), dont l'anatomie est représenté par Fig.139, 140. Passant sur le tautog, le poisson-loup vorace{Anarrhichas), le BlennidcB (blennies), ui qui l'bodyis longue et étroite, et l'anguille vivipare (Zoarces-pout), thecottoids ou chabot, et un certain nombre de formes alliées, nous arrivons TEE BONT POISSONS. 163 à l'{Ulinearis Merlucius merlu), l'églefin (arammus mglefinus-Melano, cochon. 167) et la morue (Gadus morrhua,Fig. 168), qui ouvrent toutes vers le nord depuis le cap Hat-teras, l'abondance de la morue des deux côtés de l'Atlantique

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First lesson in zoology : adapted for use in schools . ecunner (Tautogo-labrus adspersus), whose anatomy is represented by Figs.139, 140. Passing over the tautog, the voracious wolf-fish{Anarrhichas), the blennies (BlennidcB), iu which the bodyis long and narrow, and viviparous eel-pout (Zoarces), thecottoids or sculpins, and a number of allied forms, we come TEE BONT FISHES. 163 to the hake {Merlucius Ulinearis), the haddock (Melano-arammus mglefinus, Pig. 167) and cod {Gadus morrhua, Fig. 168), all of which extend northwards from Cape Hat-teras, the cod abounding on both sides of the Atlantic, being a circumpolar fish. The cod does not, as formerlysupposed, migrate along the coast, but seeks the cool tem-perature to which it is adapted by gradually passing in theearly summer from shallow to deep water, and returning asthe season grows colder. It visits the shallow water ofMassachusetts Bay to spawn about the first of NoTember, and towards the last of the month deposits its eggs. Abouteight or nine millions of eggs are annually deposited by. FiQ. 167.—The Haddock, Melanogrammus mgUflrvas. each female. The eggs laid by the cod rise to the surfaceof the water, on which they float. The young fish hatchon the New England coast in twenty days after they are ex-truded. The cod is the most important of all the food-fishes, whether we consirl^r the number taken or the amount ofcapital involved 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 fi

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• bookcentury1800
• bookdecade1890
• booksubjectzoology
• bookyear1894