File:Image from page 264 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14598418638).jpg

Identifier: introductiontozo00dave Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools; Year: 1900 (1900s) Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866- Subjects: Zoology Publisher: New York, Macmillan company London, Macmillian and co., ltd. Contributing Library: MBLWHOI Library Digitizing Sponsor: MBLWHOI Library View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: and at night they feed, their principalprey being small aquatic animals, the young of other fish,and shrimps and crayfishes during the moulting period.On account of the narrowness of the gill-opening, theymay live for some time out of water in a moist place. Thereproduction of the eel was long a mystery. All sorts ofcreatures have in past times been supposed to producethem, ranging from the gods to water-beetles. They haveeven been thought to be generated from slime. We nowknow, however, that there are both male and female indi-viduals ; that the males live chiefly, but not exclusively, inthe sea; that reproduction occurs chiefly in the sea; andthat the young females come from the sea and pass up therivers during the spring. The pipe-fishes and their allies (Lophobranchii) include Fig. 227. THE KNELT AND ITS ALLIES 245 a number of aberrant forms. Some of these are greatlyelongated, like the pipe-fish proper (Fig. 228) ; others areshorter and stouter, like the u sea-horse. All have an Text Appearing After Image: FIG. 228. — Siphostomafuscum, the pipe-fish. Nat. size. Photo, by W. H. C. P. elongated snout, and usually a long, slender tail. Thebody is encased in bony plates, and the male is often pro-vided with a brood-pouch, in which the developing youngare carried. Besides the bony fishes, which we have just consideredin detail, there are various other classes of fish. Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.