. Elementary text-book of zoology. Zoology. fh. FIG. 255.—Developmental history of Distomitm (partly after R. Leuckart). u, free swimming ciliated embryo of the liver fluke. 4, the same in a state of contraction with rudimentary alimentary canal (D) and nell mass (Or) (rudiments of the genital glands). Ex, ciliated apparatus of the rudimentary excretory system, c, sporocyst developed from a Distomum embryo, filled with Cercarire (C) ; B. Boring spine of a Cercaria. d Redia with pharynx, (Ph), and alimentary canal (D); O, mouth; Ex, Excretory organ; C, Cercaria inside Redia. e, Free Cercaria ;
. Elementary text-book of zoology. Zoology. fh. FIG. 255.—Developmental history of Distomitm (partly after R. Leuckart). u, free swimming ciliated embryo of the liver fluke. 4, the same in a state of contraction with rudimentary alimentary canal (D) and nell mass (Or) (rudiments of the genital glands). Ex, ciliated apparatus of the rudimentary excretory system, c, sporocyst developed from a Distomum embryo, filled with Cercarire (C) ; B. Boring spine of a Cercaria. d Redia with pharynx, (Ph), and alimentary canal (D); O, mouth; Ex, Excretory organ; C, Cercaria inside Redia. e, Free Cercaria ; S, sucker ; D, alimentary canal. sporocyst or redia], which probably correspond to the germinal cells (primitive ova) of the rudimentary ovary, to the generation of the * As R. Leuckart has rightly observed, the Dicyeniitlre. which were regarded as Jli'Mziiti by Ed. v. Beneden, as well as the Orthonectidce, which ha\v recently been especially investigated by Giard and E. Metsctmikofl:. and which in the reproductive stage do not rise above a form corresponding to the embryos of Trematodes, recall these Distomum 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
