Tritici, which lives encysted in ears of wheat), other species occasionally adopt the parasitic mode of existence, and become encysted in slugs, snails, &c.; (3) it has been experimentally proved that many normally parasitic genera are capable of leading a free existence;' (4) transitional forms exist which are free at one period of their life and parasitic at another. [Please select]
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_] [Illustration: Vorticella microstoma, the encysted animal protruding through a supposed rupture of the tunic. [Please select]
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[Illustration: Encysted Vorticella, showing the obliteration of special organs by the advancement of the process. [Please select]
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An operation was performed and an encysted hairpin was removed from the peritoneal cavity. [Please select]
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Piece of lining of fourth stomach showing cysts of the encysted stomach worm (_Ostertatia ostertagi_) 523 18. [Please select]
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Portion of grass stalk bearing three encysted cercariæ of the common liver fluke (_Fasciola hepatica_) 527 22. [Please select]
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The tissue, thus encysted, gradually softens, becomes disintegrated, and breaks down into pus. [Please select]
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