. A guide to the study of fishes. Fishes; Zoology; Fishes. 148 The Apodes, or Eel-like Fishes cephali, pass through a band-shaped or leptocephalous stage, as is the case with Albula and other Isospondyli. In the con- tinued growth the body becomes firmer, and at the same time. Fig. 102.—Larva of Common Eel, AngutLLa chrmypa (Rafinesque), called Lepto- cevhalus grassii. (After Eigenmann.) much shorter and thicker, gradually assuming the normal form of the species in question. In a recent paper Dr. Carl H. Eigenmann has very fully reviewed the life-history of the eel. The common species live in
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. A guide to the study of fishes. Fishes; Zoology; Fishes. 148 The Apodes, or Eel-like Fishes cephali, pass through a band-shaped or leptocephalous stage, as is the case with Albula and other Isospondyli. In the con- tinued growth the body becomes firmer, and at the same time. Fig. 102.—Larva of Common Eel, AngutLLa chrmypa (Rafinesque), called Lepto- cevhalus grassii. (After Eigenmann.) much shorter and thicker, gradually assuming the normal form of the species in question. In a recent paper Dr. Carl H. Eigenmann has very fully reviewed the life-history of the eel. The common species live in fresh waters, migrating to the sea in the winter. They deposit in deep water minute eggs that float at the surface. The next year they develop into the band-shaped larva. The young eels enter the streams two years after their parents drop down to the sea. It is doubtful whether eels breed in fresh water. The male eel is much smaller than the female. The eel is an excellent food-fish, the flesh being tender and oily, of agreeable flavor, better than that of any of its rela- tives. Eels often reach a large size, old individuals of five or six feet in length being sometimes taken. Species of Eels.—^The different species are very closely related. Not more than four or five of them are sharply defined, and these mostly in the South Seas and in the East Indies. The three abundant species of the north temperate zone, Anguilla anguilla of Europe, Anguilla chrisypa of the eastern United States, and Anguilla japonica of Japan, are scarcely distinguishable. In color, size, form, and value as food they are all alike. Fossil species referred to the AnguillidcB are known from the early Tertiary. Anguilla lepioptera occurs in the Eocene of Monte Bolea, and Anguilla elegans in the Miocene of CEningen in Baden. Other fossil eels seem to belong to the Nettasto- midcE and MyridcB. Pug-nosed Eels.—Allied to the true eel is the pug-nosed eel, Simenchelys parasiticus, constituting the family o