. Fresh-water biology. Freshwater biology. 760 FRESH-WATER BIOLOGY 24 (25) Hyaline lamella broad, extending beyond the end of the segment, second basal segment of right exopodite of male fifth foot armed on the posterior surface with small hook. Diaptomus leplopus Forbes 1882. Found generally distributed through the Mississippi Valley, and extending into Canada. The variety piscinae occurs in some of the more northern collections and as far west as Flathead Lake, Montana. This differs from typical leplopus mainly in the greater length of the endopodites of the male fifth feet and in the fact t
. Fresh-water biology. Freshwater biology. 760 FRESH-WATER BIOLOGY 24 (25) Hyaline lamella broad, extending beyond the end of the segment, second basal segment of right exopodite of male fifth foot armed on the posterior surface with small hook. Diaptomus leplopus Forbes 1882. Found generally distributed through the Mississippi Valley, and extending into Canada. The variety piscinae occurs in some of the more northern collections and as far west as Flathead Lake, Montana. This differs from typical leplopus mainly in the greater length of the endopodites of the male fifth feet and in the fact that in the female fifth feet the third segment of the exopodite is indistinctly separated and armed with two spines with a third one present on the second segment. This third spine is absent in leplopus. Length of female, to mm. Length of male, to mm. Fig. 1183. Diaptomus leplopus, male. A, ter- minal segments of right antenna. X 185. B^ fifth feet. X83. (Original.). 25 (24) Hyaline lamella narrow, extending beyond the end of the segment slightly, if at all; first basal segment of right fifth foot of male armed with hook equal in length to first segment of exopodite Diaptomus clavipes Schacht 1897. Has been found in three locali- ties, in West Okoboji Lake, Iowa, near Lincoln, Nebraska, and at Greeley, Colorado. Length of female from to 2-5 nun. Fig. 1184. Diaptomus clavipes, male. A, fifth feet. X 83. B, terminal segments of right antenna. X 141. Original.). 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
