. Fresh-water biology. Freshwater biology. THE WATER FLEAS (CLADOCERA) 733 224 (220, 223) About mm. Antennule with one olfactory seta proximal to cluster at end Chydorus ovalis Kurz MM. Fig. 1154. ChydoTus ovalis. Entire specimen and antennule. Form round or broad oval. Post- abdomen with rounded apex; r2-i5 inarginal denticles. Claws with 2 basal spines, the proximal minute. Color yellow, transparent. Length, 9» to mm.; '(European), mm. Rare; Nebraska. 225 (217) Ventral edge of keel of labrum with one or more teeth. 226 226 (227, 228) With several teeth; short spine at
. Fresh-water biology. Freshwater biology. THE WATER FLEAS (CLADOCERA) 733 224 (220, 223) About mm. Antennule with one olfactory seta proximal to cluster at end Chydorus ovalis Kurz MM. Fig. 1154. ChydoTus ovalis. Entire specimen and antennule. Form round or broad oval. Post- abdomen with rounded apex; r2-i5 inarginal denticles. Claws with 2 basal spines, the proximal minute. Color yellow, transparent. Length, 9» to mm.; '(European), mm. Rare; Nebraska. 225 (217) Ventral edge of keel of labrum with one or more teeth. 226 226 (227, 228) With several teeth; short spine at infero-posteal angle of valves. Chydorus harroisi (Richard) 1894. Form and size much like sphaericus, though ventral margin is less curved. Keel of la- brum acuminate behind; serrate, with four or more teeth. Post-abdomen with well-devel- oped pre-anal angle; 10-12 marginal denticles, shortest in middle of row. Color brown-yel- low. Length, 9» ca- o-4 mm. Rare; Lake Charles, Louisiana. Fig. 1155. Chydorus 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
