. Animal parasites and messmates. Parasites. TRANSMIGRATIONS AND METAMORPHOSES. 25a Echinorhijnchiis cjigas. Pigs disseminate the eggs, and the embryos infest these larvae, in the bodies of which they pass through then- principal changes. The Gregarinee are microscopic beings, with an extremely simple organization, the natm-e and the genealogy of which have only lately been known. They live at first encysted by thousands together, under the name of Psorospermide; they are afterwards hatched in the form of Amoeba, and then transformed into Gregarinae. They migrate from one animal to another, or
. Animal parasites and messmates. Parasites. TRANSMIGRATIONS AND METAMORPHOSES. 25a Echinorhijnchiis cjigas. Pigs disseminate the eggs, and the embryos infest these larvae, in the bodies of which they pass through then- principal changes. The Gregarinee are microscopic beings, with an extremely simple organization, the natm-e and the genealogy of which have only lately been known. They live at first encysted by thousands together, under the name of Psorospermide; they are afterwards hatched in the form of Amoeba, and then transformed into Gregarinae. They migrate from one animal to another, or from one organ to another, to settle in the intestine, where they assume their adult form. In this state they are mono- cellular, and do not at anytime possess organs which resemble the sexual organs of other classes. The disease of silk worms, known by the name of " pebrine," has been attributed to the development of psorospermiEe. We give the representation (Fig. 74) of gregarinae which we have fomid abundantly on the Nemertes; and. 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 Beneden, M. van (Pierre Joseph), 1809-1894. New York, D. Appleton and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectparasit, bookyear1876
