. Fresh-water biology. Freshwater biology. 866 FRESH-WATER BIOLOGY 35 (32) Acetabula arranged along the posterior margin of the body, in one or more rows, running forward on either side nearly to the point of insertion of leg IV, which leg is, in the male, modi- fied Aturus Kramer Very small mites, varying in length from to mm., with the posterior margin of the body deft; no swimming-hairs; leg IV of male with segs. 4 to 6 strikingly modified. One species, Aturus mirabitis, is recorded from Canada by Koenike. The genus is characteristic of rapidly flowing streams. Fig. 1337. A
. Fresh-water biology. Freshwater biology. 866 FRESH-WATER BIOLOGY 35 (32) Acetabula arranged along the posterior margin of the body, in one or more rows, running forward on either side nearly to the point of insertion of leg IV, which leg is, in the male, modi- fied Aturus Kramer Very small mites, varying in length from to mm., with the posterior margin of the body deft; no swimming-hairs; leg IV of male with segs. 4 to 6 strikingly modified. One species, Aturus mirabitis, is recorded from Canada by Koenike. The genus is characteristic of rapidly flowing streams. Fig. 1337. Aturus sraber (Kramer), a European spe- cies. Ventral surface of male. X 6i. Outer side of palpus, female. X 150. (Modified from Piersig.) 36 (31) Suture open anteriorly, the two ends passing around on to the ven- tral surface 37 37 (38) Genital area with 4 acetabula on each side . Axonopsis Piersig 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. ]
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
