. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. LIXGUATULIDA ACAEIXA. 4S9 testine and reach the Hver. There they surround themselves with a cyst, in which they pass through a seiies of changes of form, ac- companied, as in insect larva;, by repeated ecdyses (tig. 378). When six montlis 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 formei-ly described as P. denticulatmn (fig. 377), in which they break through thei
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. LIXGUATULIDA ACAEIXA. 4S9 testine and reach the Hver. There they surround themselves with a cyst, in which they pass through a seiies of changes of form, ac- companied, as in insect larva;, by repeated ecdyses (tig. 378). When six montlis 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 formei-ly described as P. denticulatmn (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, lu other cases, on the other hand, they soon become enveloped in. T ^ J' ''o. 379.—Ripe male of Atax Bonzi, Been from the dorsal surface (after E. Claparede). Kt, Pedipalpus; G, brain; Oc, eyes; T. testis; N, Y-shaped gland; D, intestine; A, anus ; Ud, cutaneous glands. another cyst. If they now pass with the flesh of the Hare or Eabbit into the buccal cavity of the Dog, they penetrate into the neighbouring air-chambers, and in two or three months bocome sexually mature. Pentastommn tcenioides Rud., mm., Male only 18-20 mm. long. P. multicinctum Harl., in the liver of Naja haje. P. constrictum v. Sieb. Encysted in the liver of negroes in Egypt. Order 2.—Acarina,* Mites. Arachnula with stout body. The abdomen is unsegmented and •0, Fr. Miiller, " Hydrachnfe," etc., 1781. A. Dug&s, " 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; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
