. Zoology : for students and general readers . Zoology. THE GILIATE INFUSORIA. 35 ers, so that when the organism lias by means of its hollow arms or tentacles caught some Infusorian, the arms con- tract, draw the victim nearer to the Acineta, and when the sucking disk at the end of the arms has penetrated the skin, the contents of the body of the Infusorian are sucked into the food-cavity of the Acine- ta ; on the other hand, in some Acinetai a portion of the arms are simply prehensile. These animals are in their adult phase quite unlike the FlageUata or Ciliata, but the young are developed wi
. Zoology : for students and general readers . Zoology. THE GILIATE INFUSORIA. 35 ers, so that when the organism lias by means of its hollow arms or tentacles caught some Infusorian, the arms con- tract, draw the victim nearer to the Acineta, and when the sucking disk at the end of the arms has penetrated the skin, the contents of the body of the Infusorian are sucked into the food-cavity of the Acine- ta ; on the other hand, in some Acinetai a portion of the arms are simply prehensile. These animals are in their adult phase quite unlike the FlageUata or Ciliata, but the young are developed within the parent and are provided with cilia, being at first free- swimming, and afterward fixed by a long stalk. The Acinetm sometimes self-di- vide, sending off from the free end of the body a ciliated Acinete ; they have also been seen to conjugate. Order 3. Ciliata (Infuso- ria).âA common type of this group and one easy to obtain by the student is Parame- cium (Fig. 24), observed in infusions, or moving rapidly over the bodies of larger ani- view"from the dorHal side, magnified 340 1 1 â -1 1 J il, diameters. IT, the head; T, the tail; m, malS which may be under the the mouth; m to g. the throat; «, the pos- minrnapn-np "PiornrP 94- rP'r\- terior opening of the digestive cavity; c»' microscope. C Igure at rep- jjjg anterior and cv posterior contractile rpspnl-s Pnrrtmprinim rniirin- vesicles; I, II, III, the radiating canals of lebenuB jr ui anwi^iiom cuauu ^,. ^^ jj,^. reproductive organ; v, the large vihrating cilia ntthe edge of the ves- tibule.âAfter H. J. Paramecium caudatam. ani- tum Ehrenberg. This malcule is a mass of proto- plasm, representing a single cell In the body-mass are ex-. 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 Packard, A. S. (Alpheus Spring), 1839-19
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
