. A manual of zoology. Zoology. II. TREMATODA: DISTOME.^. 275 appear in larval life, and not always then. Since not exjiosed to danger of being pulled, from tlie host, they possess either the oral sucker alone (Monostomum) or this and a second ventral sucker,. ^^'â ^x^^^^^. Fig. :W1.âDevelopment of Distonuim liepaticum. (From Korsfhelt-Heider after Leuck- iirt.) .4, young Itirva; B, sporocyst from the lunfc of Liwim-a; a, older sporocyst witli redia'.; D, redia whinli has produced redise internally ; E, redia with cer- curiie; J',-ceroaria ; G, encysted JJistomum. .4, eye spot; ZJ, digestive t
. A manual of zoology. Zoology. II. TREMATODA: DISTOME.^. 275 appear in larval life, and not always then. Since not exjiosed to danger of being pulled, from tlie host, they possess either the oral sucker alone (Monostomum) or this and a second ventral sucker,. ^^'â ^x^^^^^. Fig. :W1.âDevelopment of Distonuim liepaticum. (From Korsfhelt-Heider after Leuck- iirt.) .4, young Itirva; B, sporocyst from the lunfc of Liwim-a; a, older sporocyst witli redia'.; D, redia whinli has produced redise internally ; E, redia with cer- curiie; J',-ceroaria ; G, encysted JJistomum. .4, eye spot; ZJ, digestive tract; I)i\ glands; Ei\ ciliated lobules and main trunks of excretory system ; G, birth open- ing ; Kz, germ cells; N^ nervous system. and only rarely other attaching apparatus. They are markedly separated from the Polystomes by their life history. The alterna- tion of hosts necessitated by the endoparasitic life is complicated by an alternation of generations (better heterogony, p. 145) with. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
