. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 393 88 (85) Body flat, thin, transparent; no cirrus sac present. Family Opisthorchiidae Luhe 1901 . 89 Elongate flattened transparent distomes with weak musculature. Suckers close together and very weak. Intestinal crura reach fully or nearly to posterior end. Excretory bladder Y-shaped with short branches and long stem. Genital pore close in front of acetabulum. No cirrus or cirrus sac. Coiled seminal vesicle. Germ glands in series in posterior region, ovary in front of testes. Vitellaria outside intestinal crura, moderately devel
. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 393 88 (85) Body flat, thin, transparent; no cirrus sac present. Family Opisthorchiidae Luhe 1901 . 89 Elongate flattened transparent distomes with weak musculature. Suckers close together and very weak. Intestinal crura reach fully or nearly to posterior end. Excretory bladder Y-shaped with short branches and long stem. Genital pore close in front of acetabulum. No cirrus or cirrus sac. Coiled seminal vesicle. Germ glands in series in posterior region, ovary in front of testes. Vitellaria outside intestinal crura, moderately developed, not reaching posterior end. Uterus long, preovarian, in transverse loops, mostly postacetabular. Eggs very numerous, small, light yellowish brown in color. Parasites of gall passages of Amniota. An important parasite of man, Clonorchis sinensis, which belongs to this family has been introduced several times into this continent but apparently has not gained a footing. 89 (90) Neither uterine coils nor vitellaria extend anteriad beyond acetabulum Opisthorchis R. Blanchard 1895. Anterior end conical, posterior end broader. Main stem of excretory bladder S-shaped, passing between testes, anterior forks of Y short. Vitellaria in groups. In gall ducts of mammals, birds, and (?) fishes. Youn^ distomes encysted in skin and con- nective tissues, especially subdermal tissue of fishes. Several species in North America; best known 0. pseudofelineus Ward igor in the cat. Fig. 680. Opisthorchis pseudofelineus. From liver of cat. X 5- (Criginal.) 90 (89) Uterine coils and vitellaria both in part anterior to acetabulum. Meiorchis Looss 1899. Small to moderate sized distomes with short, compressed body tapering anteriad. Skin spinous. Testes sUghtly lobed, nearly symmetrical. Coils of uterus compact, extending clearly over crura to margins. Vitellaria compact, extending anterior to acetabulum. A single American species M. complexus (Stiles and Hassall) from the liver of cat. New York, Mar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
