. Fresh-water biology. Freshwater biology. 398 FRESH-WATER BIOLOGY. branches reach to posterior margin of pharynx. Testes elongate, parallel, dorsal, in posterior third of body; seminal vesicle convoluted, large; no cirrus or sac. Ovary ventral, proximate to testes, slightly lobed; Laurer's canal (?); vitellaria lateral, in central region. Uterus with descending ramus on right, slightly coiled, extending to posterior end, ascending ramus returning on left, crossing anterior to ovary and passing on right to genital atrium. Eggs small, dark, about 20 by 1011. Type genus. Cryptogonimus H. L. Osbo
. Fresh-water biology. Freshwater biology. 398 FRESH-WATER BIOLOGY. branches reach to posterior margin of pharynx. Testes elongate, parallel, dorsal, in posterior third of body; seminal vesicle convoluted, large; no cirrus or sac. Ovary ventral, proximate to testes, slightly lobed; Laurer's canal (?); vitellaria lateral, in central region. Uterus with descending ramus on right, slightly coiled, extending to posterior end, ascending ramus returning on left, crossing anterior to ovary and passing on right to genital atrium. Eggs small, dark, about 20 by 1011. Type genus. Cryptogonimus H. L. Osborn 1903. The genus has been placed in the Acanthochasmidae; see note under 83 (75). Even if that action be justified it occupies a position suffici- ently isolated to demand rank in a separate subfamily as indicated here. Only species known in North America. Cryptogonimus chyli Osborn 1903. In stomach and intestine of Micropterus dolomieu and Amhloplites rupestris; Lake Chautauqua, New York; St. Mary's River, Michigan; Canada. Young distomes encysted in small black bass, rock bass, and minnows (Cooper). Fig. 689. Cryptogonimus chyli. Ventral view with spines omitted and coils of uterus simplified. X 9- (After Osbom.) 107 (66) Coils of uterus extend well beyond testes into posterior portion of body. . 108 108 (109) Mouth surrounded by a crown of six muscular papillae which are outgrowths of oral sucker. . Bunodera. See note under 66 in this key and description with figure imder 103. 109 (108) Mouth without crown of papillae no no (lis) Vitellaria represented by small sohd more or less lobed organ on each side of body just anterior to ovary. Family Gorgoderjdae Looss 1901. Muscular distomes with slender mobile anterior region and flattened posterior region. Suckers muscular; acetabulum especially projects noticeably beyond surface of body. Skin without spines but often with fine papillae. Esophagus long without, or short with pharynx. Crura simple, extend to posterior end. Excret
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
