. British fresh water fishes. Fishes -- Great Britain. igi Bampreys. THE Lampreys, Lamperns, or "nine-holes," as in some places they are termed, belong- to a very remarkable family of fishes. â From their habit of attaching- themselves to stones or other submerged bodies, they have received the name of PdromyzontidcE, which in Greek signifies "stone-suckers," a term aptly proposed by Artedi. The body is -worm-like, C3-Iin- drical, and limbless; the skeleton is imperfectly developed, being cartilaginous; the notochord is persistent through life; there are no ribs, and no rea
. British fresh water fishes. Fishes -- Great Britain. igi Bampreys. THE Lampreys, Lamperns, or "nine-holes," as in some places they are termed, belong- to a very remarkable family of fishes. â From their habit of attaching- themselves to stones or other submerged bodies, they have received the name of PdromyzontidcE, which in Greek signifies "stone-suckers," a term aptly proposed by Artedi. The body is -worm-like, C3-Iin- drical, and limbless; the skeleton is imperfectly developed, being cartilaginous; the notochord is persistent through life; there are no ribs, and no real jaws; the skin is without scales and lubricous; the fin-fold of the tail is destitute of fin ra3^s; the gills have no branchial arches, and are formed like little pockets or pouches. The mouth is of very peculiar. Sucker of Lamprey. structure, of circular form in the adult fish, suctorial, and armed with either simple or many-pointed teeth of horny consistency. The nasal cavities do not communicate with the throat; the gill-pouches, with their external holes or openings, are seven in number, situated on each side of the neck, so that the popular name of "nine-holes" is an erroneous one. The respiratory apparatus is very peculiar; fishes as a rule admit water through the mouth and emit it through the branchial slit, or gill opening; the Lampreys fix themselves to submerged bodies by their suctorial mouth, so that when in such a position it is obvious that no water can be admitted through the mouth. How then is the water admitted so as to oxygenate the blood of the gill-pouches? The water is alternately received and expelled. 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 Houghton, W. (William), 1828-1895; Lydon, A. F. (Alexander Francis), 1836-1917, ill. London [etc. ] : W. Mackenzie
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1879
