. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. LIXGUATULIDA 4S9 testine and reach the liver. There they surround themselves with a cyst, in which they pass through a series of changes of form, ac- companied, as in insect larva1, by repeated ecdyses (fig. 378). When six months have elapsed, they have attained a considerable size and have acquired the four oral hooks, as well as a number of finely serrated superficial rings. They have now reached the stage formerly described as P. denticulatum (fig. 377), in which they break through their
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. LIXGUATULIDA 4S9 testine and reach the liver. There they surround themselves with a cyst, in which they pass through a series of changes of form, ac- companied, as in insect larva1, by repeated ecdyses (fig. 378). When six months have elapsed, they have attained a considerable size and have acquired the four oral hooks, as well as a number of finely serrated superficial rings. They have now reached the stage formerly described as P. denticulatum (fig. 377), in which they break through their capsules and begin a fresh migration. They traverse the liver, and if present in great numbers, occasion the death of their host. In other cases, on the other hand, they soon become enveloped in. 379.—Ripe male of Atax Sonzi, seen from the dorsal surface (after E. Claparede). El, Pedipalpus ; G, brain; Oc, eyes; T. testis; N, Y-ahaped gland; D, intestine; A, anus ; lid, cutaneous glands. another cyst. If they now pass with the flesh of the Hare or Rabbit into the buccal cavity of the Dog, they penetrate into the neighbouring air-chambers, and in two or three months become sexually mature. Pentastomum t&nioides Rutl., 80-85 mm., Male only 18-20 mm. long. P. multicinctum Harl., in the liver of Naja liajc. P. constrictum v. Sieb. Encysted in the liver of negroes in Egypt. Order 2.—ACARINA,* MITES. Aruchnida with stout body. The abdomen is unsegmented and * 0. Fr. Miiller, " Hydrachnre," etc., 1781. A. Duges, " Recherches sur. 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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