. Fresh-water biology. Freshwater biology. With a separate pocket for the chitinous portion of male copulatory organ. Sexual pore lies in last third of body . Jensenia. Only one species known in this country. Jensenia pinguis (Silliman) 1885. Length about mm. Color brown to reddish, darkest in middle of body. Male genital canal divided at its connection with the common atrium, one branch forming the pocket for the chitinous organ while the other leads to the seminal ves- icle. Rochester, N. Y. Fig. 618. Jensenia pinguis. {A) Entire: m, mouth; vi, yolk glands; t, testes; «, eye; ph, pharynx
. Fresh-water biology. Freshwater biology. With a separate pocket for the chitinous portion of male copulatory organ. Sexual pore lies in last third of body . Jensenia. Only one species known in this country. Jensenia pinguis (Silliman) 1885. Length about mm. Color brown to reddish, darkest in middle of body. Male genital canal divided at its connection with the common atrium, one branch forming the pocket for the chitinous organ while the other leads to the seminal ves- icle. Rochester, N. Y. Fig. 618. Jensenia pinguis. {A) Entire: m, mouth; vi, yolk glands; t, testes; «, eye; ph, pharynx; s, glands; i, intestine. X 30. (After Silliman.) {B) Sexual organs from animal compressed from side: bs, bursa seminalis; bsm, retractor mus- cles of same; ch, pocket which contains chitinous organ; chm, one of four muscles for same; e, egg; gd, oviduct; ge, ovary; go, genital pore; sd, shell glands; te, testes; udi, uterus diverticulum of atrium; ust, duct of uterus; vd, vasa deferentia; vs, vesi- cula seminalis; vst, duct from same; wgc, female genital canal. X 60. (After von GraS.). 61 (32) Pharynx rosette-shaped, standing perpendicular to the ventral surface Family TvpHLOPLANmAE . 62 The genital pore lies back of the mouth. Ovary one, testes paired. Other parts of sexual organs variable. Protonephridium with two main branches which may have either one or two openings on the ventral surface or may lead to the surface through the mouth or sexual pore. Eyes, non-pigmented light-refracting organs; ciliated pits may be present. Rhabdoids play an important part in classification. Both summer and winter eggs produced in some species. 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 resemble the original Ward, Henry Baldwin, 1865-1945; Whipple, George Chandler, 1866-1924. joint author. New York, John Wiley & sons, inc. ; [etc.
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
