. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 439 51 (50) Testes number 150 to 215. Ophiotaenia perspicua La Rue 1911. Length up to 360 mm., maximum breadth about mm. First proglottids short, mature proglottids quadrate ( mm.) or somewhat longer than broad, ripe proglottids as much as mm. long by mm. broad. Genital pore situated near middle or at end of first third of proglottid. Testes rso to 215. Vas deferens in ripe proglottids heavy mass of coils reaching from end of cirrus-pouch to mid-field. Ratio of length of cirrus-pouch to proglottid breadth i : 4 to 1:
. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 439 51 (50) Testes number 150 to 215. Ophiotaenia perspicua La Rue 1911. Length up to 360 mm., maximum breadth about mm. First proglottids short, mature proglottids quadrate ( mm.) or somewhat longer than broad, ripe proglottids as much as mm. long by mm. broad. Genital pore situated near middle or at end of first third of proglottid. Testes rso to 215. Vas deferens in ripe proglottids heavy mass of coils reaching from end of cirrus-pouch to mid-field. Ratio of length of cirrus-pouch to proglottid breadth i : 4 to 1:3. Vagina anterior or pos- terior to but not crossing cirrus-pouch. Uterus with 20 to 30 lateral pouches on each side. Habitat: Natrix(Nerodia) cAojuii/er Hallowell; Illinois, Oklahoma. Fig. 742. Ophiotaenia perspicua. a. Head, X 23: h, ripe proglottid, showing uterine poucues, and testes. (After La Rue.). 52 (49) Genital pore at or near center of margin of proglottid. Ophiotaenia grandis La Rue 1911. Very long (fragments 200 mm.), to mm. broad in ripe proglottids. First proglottids muchbroader than long; proglottids with develop- ing sexual organs quadrate or nearly so; ripe pro- glottids quadrate or much longer than broad. Head large, to mm. broad at base of suck- ers. Suckers about by mm. Testes large, numerous, 200 to 250. Cirrus-pouch to mm. broad, to mm. long, enclosing few or no coils of ductus ejaculatorius. Uterus with 40 to 60 lateral outpocketings on each side. In intestine of Ancistrodon pisciwrus Holbr., locaUty not known. Fig. 743. Ophiotaenia grandis. a, Head, showing swollen region back of head, X 8; 6, mature pro- glottid, ventral view showing reproductive organs and ventral uterine pores (m/ii^). X id. (After La Rue.). 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 resem
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
