. Fresh-water biology. Freshwater biology. Fig. 517. Urostyla trichogaster. Conn.) 137 (136) Peristome without an undulating membrane. 138 (139) Elongate, rounded at both extremities, not flejdble; five nearly straight rows of ventral cilia. Peristome on the right-hand margin, extending back of the middle, with a row of long cilia or membraneUae. Nuclei four to six in number. Homostyla Conn. Representative species Homostyla elliptica Conn 1905. Fig. 518. Homostyla elliptica. X 325. (After Conn.) 139 (138) Kidney-shaped, with six oblique rows of ventral cilia, the posterior row the stronger. No
. Fresh-water biology. Freshwater biology. Fig. 517. Urostyla trichogaster. Conn.) 137 (136) Peristome without an undulating membrane. 138 (139) Elongate, rounded at both extremities, not flejdble; five nearly straight rows of ventral cilia. Peristome on the right-hand margin, extending back of the middle, with a row of long cilia or membraneUae. Nuclei four to six in number. Homostyla Conn. Representative species Homostyla elliptica Conn 1905. Fig. 518. Homostyla elliptica. X 325. (After Conn.) 139 (138) Kidney-shaped, with six oblique rows of ventral cilia, the posterior row the stronger. No frontal, ventral, or anal styles. Border cilia forming a complete row around the periphery. Peri- stome reaching to the middle of the body. External para- sites on Hydra. ... ... Kerona Ehrenberg. Representative species Kerona pediculus MiiWei lySO. Fig. stq. Kerona pediculus. X 250. (After Stein.) 140 (13s) Less than five rows of ventral cilia 141 Body elongated anteriorly into a neck; rounded behind, very con- tractile. Peristome narrow, extending to or beyond the middle. MembraneUae long. Two or three oblique rows of ventral setae. No frontal or anal styles. Stichotricha Perty. Representative species Stichotricha secunda Perty 1849. Marginal setae long and slender. Nuclei two, with the contractile vacuole between. Often a mucilaginous sheath is secreted by the animal, from which it may project the anterior half of the body or may entirely vacate it and swim freely in water. Length about 200 li. Among sphagnum. Fig. 520. Stichotricha secunda. X 235. (After Comi.). 141 (142). 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. ,etc. ]
Size: 2045px × 1222px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
