. Fresh-water biology. Freshwater biology. MM. 242 (239) Rostrum short or moderate; shape globose; valves conspicuously striated Alonella nana (Baird) 1850. Very minute; Chydorus-\\\it. Valves coarsely and con- spicuously striated; minute tooth in infero-posteal region. Rostrum varies, usually rather long, recurved, consider- ably exceeding antennules. Post-abdomen short; pre- anal angle strongly projecting; apex rounded; about 6 marginal denticles. Claws with i small spine. Color brownish, usually opaque. Length, 9. mm.; $, mm. New England, Wisconsin, Minnesota; rare. The sm
. Fresh-water biology. Freshwater biology. MM. 242 (239) Rostrum short or moderate; shape globose; valves conspicuously striated Alonella nana (Baird) 1850. Very minute; Chydorus-\\\it. Valves coarsely and con- spicuously striated; minute tooth in infero-posteal region. Rostrum varies, usually rather long, recurved, consider- ably exceeding antennules. Post-abdomen short; pre- anal angle strongly projecting; apex rounded; about 6 marginal denticles. Claws with i small spine. Color brownish, usually opaque. Length, 9. mm.; $, mm. New England, Wisconsin, Minnesota; rare. The small- est member of the family. Fig. 1164. Alonella crMWli,. 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
