. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. . FIG. 255.—Developmental history of Disfomitm (partly after R. Lcuckart). a, free swimming' ciliated embryo of the liver flnke. !>, the same iu a state of contraction with rudimentary alimentary canal (D) and cell mass (Or) (rudiments of the genital glands). Ex, ciliated apparatus of the rudimentary excretory system, c, sporocyst developed from a Distomum embryo, filled with Cercaria? (C) ; S. Boring spine of a Cercaria. d Redia with pharynx, (Ph), and alimentary canal (D); O, mouth; Ex
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. . FIG. 255.—Developmental history of Disfomitm (partly after R. Lcuckart). a, free swimming' ciliated embryo of the liver flnke. !>, the same iu a state of contraction with rudimentary alimentary canal (D) and cell mass (Or) (rudiments of the genital glands). Ex, ciliated apparatus of the rudimentary excretory system, c, sporocyst developed from a Distomum embryo, filled with Cercaria? (C) ; S. Boring spine of a Cercaria. d Redia with pharynx, (Ph), and alimentary canal (D); O, mouth; Ex, Excretory organ ; C, Cercaria inside Redia. c, 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 E. Leuckart has rightly observed, the Dlcyentlda; which were regarded as Mesozoa by Ed. v. Beneden, as well as the Ortlxmcctidfr, which have recently been especially investigated by Giard and E. Metschnikoff. and which in the reproductive stage do not rise above a form corresponding to the embryos of Trcmatodes, 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. London, Swan Sonnenschein & co.
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Keywords: ., book, bookcentury1800, bookcollectionbiodiversity, bookdecade1890
