. Fig. 150.—Sporocyst of the common hver fluke, somev^^hat older than that of Fig. 149, in which the germinal cells are giving rise to rediae. x200. (After Leuckart, 1889, p. 109, Fig. 67 0.) into contact with cold water, the organism bursts the cap from the egg-shell, crawls through the opening, and becomes a— (c) Free-swimming ciliated miracidium (Fig. 148).—As already stated, this organism is entirely different from its mother. It measures about 0'15 mm. long; is somewhat broader in its anterior portion than in its posterior portion; on its anterior extremity we find a small eminence, known
. Fig. 150.—Sporocyst of the common hver fluke, somev^^hat older than that of Fig. 149, in which the germinal cells are giving rise to rediae. x200. (After Leuckart, 1889, p. 109, Fig. 67 0.) into contact with cold water, the organism bursts the cap from the egg-shell, crawls through the opening, and becomes a— (c) Free-swimming ciliated miracidium (Fig. 148).—As already stated, this organism is entirely different from its mother. It measures about 0'15 mm. long; is somewhat broader in its anterior portion than in its posterior portion; on its anterior extremity we find a small eminence, known as a boring papilla; the exterior surface of the young worm is covered with numerous cilia, which by their motion propel the animal through the water; inside the body we find in the anterior portion a simple vestigial intestine and a double ganglionic mass provided with a peculiar pigmented double cup-shaped eye-spot; in the posterior portion
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkwrjenkins
