. Fresh-water biology. Freshwater biology. 139 (130) No receptaculum seminis, intestinal crura half to three-fourths body length, at least never reaching posterior end. Subfamily Reniberinae Pratt 1902 . 140 Crura of medium length, reaching beyond center of body but not into posterior tip. In every case an open space or uterine coils intervene between the crura and posterior end of body. No receptaculum seminis. Testes at ends of crura, more or less symmetrical. In mouth, air passages, lungs, esophagus and stomach of snakes. A group clearly worked out and defined by Odhner, richly represented
. Fresh-water biology. Freshwater biology. 139 (130) No receptaculum seminis, intestinal crura half to three-fourths body length, at least never reaching posterior end. Subfamily Reniberinae Pratt 1902 . 140 Crura of medium length, reaching beyond center of body but not into posterior tip. In every case an open space or uterine coils intervene between the crura and posterior end of body. No receptaculum seminis. Testes at ends of crura, more or less symmetrical. In mouth, air passages, lungs, esophagus and stomach of snakes. A group clearly worked out and defined by Odhner, richly represented in North America where occur five out of the seven genera aheady described. T40 (141) Genital pore marginal or nearly so. Renifer Pratt 1902. Small distomes with elhptical, ventrally flattened body covered with fine spines. Suckers moderately developed; acetabulum larger, anterior to middle. Mouth subterminal; pharynx present; esophagus short; in- testinal ceca reach beyond acetabulum, about to center of body. Ex- cretory vessel Y-shaped. Genital pore marginal, about level of fork of intestine. Testes both symmetrical just behind center of body near ovary which is lateral at right posterior margin of acetabulum. Cirrus sac large, reaching to or beyond acetabulum with convoluted seminal vesicle. Vitellaria submoderate in size, lateral, in central third of body. Uterus with descending and ascending limb, passing between testes nearly to posterior tip; capacity provided by increase in breadth of tube and not by extension in length and formation of coils. Representative American species. Renifer ellipticus Pratt 1903. Mouth and air passages of Heterodon platyrhinus. Only one certain North American species, R. ellipticus Pratt 1903, type of the genus. Fig. 704. Renifer ellipticus. Ventral view. X IS. (After Pratt.) X41 (140) Genital pore median or nearly so 142. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
