. Fresh-water biology. Freshwater biology. THE WATER FLEAS (CLADOCERA) 713 iOS (104) Five to seven pre-anal spines; antennary setae ordinarily very long. Ilyocrypius spinifer Herrick Anus opens in depression on dorsal margin of post-abdomen; 5-7 pre-anal spines; 4-8 post-anal lateral spines in outer row. An- tennary setae usually long, some- times equaling length of valves; in some specimens they are short, apparently because of wear. Eight to ten summer eggs; true ephip- pium formed and cast off (Sars). S unknown. Color yellow or red- dish. Length, 9 . to mm. This species is /. lon
. Fresh-water biology. Freshwater biology. THE WATER FLEAS (CLADOCERA) 713 iOS (104) Five to seven pre-anal spines; antennary setae ordinarily very long. Ilyocrypius spinifer Herrick Anus opens in depression on dorsal margin of post-abdomen; 5-7 pre-anal spines; 4-8 post-anal lateral spines in outer row. An- tennary setae usually long, some- times equaling length of valves; in some specimens they are short, apparently because of wear. Eight to ten summer eggs; true ephip- pium formed and cast off (Sars). S unknown. Color yellow or red- dish. Length, 9 . to mm. This species is /. longiremis Sars; /. halyi Brady. Not uncommon; Maine to Lake Superior and Gulf of Mexico- Probably in all regions of United States. Fig. mo. Ilyocryptus spinifer. 106 (103) Anus at end of post-abdomen; molting complete. Ilyocryptus acutifrons Sars 1862. MM. i. 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
