. Fresh-water biology. Freshwater biology. General form resembling Acroperus but less com- pressed and without crest. Keel of labrum moderate or small, almost triangular. Valves obhquely striated but striae often inconspicuous. Post-abdomen long, broad; with well-developed marginal denticles. Six pairs of feet, the last very small. $ with usual characters. Color yellow. Fig. 1123. a, Alonopsis elongata; b, Alonopsis aureola. (After Doolittle.) 0,1 MM. i_ J MM, 133^(1336) 15-17 marginal denticles Alonopsis elongata S&rs 1S61. Minute tooth at mfero-posteal angle of valves. Post-abdomen w
. Fresh-water biology. Freshwater biology. General form resembling Acroperus but less com- pressed and without crest. Keel of labrum moderate or small, almost triangular. Valves obhquely striated but striae often inconspicuous. Post-abdomen long, broad; with well-developed marginal denticles. Six pairs of feet, the last very small. $ with usual characters. Color yellow. Fig. 1123. a, Alonopsis elongata; b, Alonopsis aureola. (After Doolittle.) 0,1 MM. i_ J MM, 133^(1336) 15-17 marginal denticles Alonopsis elongata S&rs 1S61. Minute tooth at mfero-posteal angle of valves. Post-abdomen with lateral fascicles. Length, 9, ca. mm. 133J (133a) About II marginal denticles. Alonopsis aureola Doolittle 1912. No lateral fascicles or infero-posteal tooth. Length, $ ca. mm.; $ unknown. Both species in margins of lakes and ponds among weeds. Rare; reported only from 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
