. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 435 34 (41) Functional fifth or apical sucker, absent or vestigial 35 35 {38) Testes number 100 or more. 36 36 (37) Genital pore on lateral margin near center of proglottid. Proteocephalus niacrocephalus (Creplin) 1825. As much as 40 cm. long by i to mm. broad, or perhaps more. Proglottids very numerous; first much broader than long; mature, broader than long or nearly quad- rate; ripe, longer than broad. Suckers to mm. in diameter. Fifth sucker vestigial. Testes 100 to 120, irregularly scattered between vitellaria,
. Fresh-water biology. Freshwater biology. PARASITIC FLATWORMS 435 34 (41) Functional fifth or apical sucker, absent or vestigial 35 35 {38) Testes number 100 or more. 36 36 (37) Genital pore on lateral margin near center of proglottid. Proteocephalus niacrocephalus (Creplin) 1825. As much as 40 cm. long by i to mm. broad, or perhaps more. Proglottids very numerous; first much broader than long; mature, broader than long or nearly quad- rate; ripe, longer than broad. Suckers to mm. in diameter. Fifth sucker vestigial. Testes 100 to 120, irregularly scattered between vitellaria, ly- ing in one or two layers, usually one. Cirrus-pouch short, about mm. long; ratio to proglot- tid breadth i : 6 to i : 8. Uterine pouches 7 to 14 on either side. Habitat: In intestine of An- guilla vulgaris and A. chrysypa _ Fig. 733. _ Proteocephalus macrocepkalus. a. Head. X 70; &, ripe proglottid showing female reproductive organs. La Rue.) X40. (After 37 (36) Genital pore on lateral margin anterior to center of proglottid. Proteocephalus perplexus La Rue 1911. Length as much as 155 mm.; maximum breadth mm. First proglottids much broader than long; mature proglottids mm. broad by mm. long; ripe proglottids quadrate or longer than broad. Suckers, to mm. long by to mm. broad. No vestig3 of fifth sucker. Genital pore at end of first fourth or half of proglottid. Cirrus-pouch to mm. long, extending to one-third or one-fifth width of proglot- tid. Testes 135 to 155 in number, in one layer an- terior to ovary. Vagina .J- anterior to cirrus-pouch, ' never crossing same. Vi- tellaria e-xtend to posterior margin of proglottid and parallel to it. Uterus with 20 to 25 lateral pouches on each side. Habitat: In intestine of Fig. 734. Proteocephalus perplexus. o. Head, X 36; 6, ripe proglottid, Ajnia cdva reconstruction showing male reproductive organs (.ti, testes), and ovary. Patostomus. Illinois,JNortn
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
