. Fresh-water biology. Freshwater biology. 724 FRESH-WATER BIOLOGY 165 (164) Post-abdomen broader toward apex. Alona intermedia Sars 1862. Body evenly arched but not very high. Post-abdomen long, broad, enlarged toward apex, with rounded angle; the 8-9 marginal denticles rather small and thick; the lateral denticles or fascicles much more conspicuous, consisting of bundles of fine setae. The distal seta in each bundle is the largest and the size of setae increases toward apex of post- abdomen. The distal bundles project beyond margin of post-abdomen. Length, 9, ca. mm. See Fig. 1129, g. Ra
. Fresh-water biology. Freshwater biology. 724 FRESH-WATER BIOLOGY 165 (164) Post-abdomen broader toward apex. Alona intermedia Sars 1862. Body evenly arched but not very high. Post-abdomen long, broad, enlarged toward apex, with rounded angle; the 8-9 marginal denticles rather small and thick; the lateral denticles or fascicles much more conspicuous, consisting of bundles of fine setae. The distal seta in each bundle is the largest and the size of setae increases toward apex of post- abdomen. The distal bundles project beyond margin of post-abdomen. Length, 9, ca. mm. See Fig. 1129, g. Rare; specimens closely agreeing with Lilljeborg's descrip- tion and figures found in Wisconsin. Possibly not Sars' inter- , as his figure of that species resembles some varieties of Lilljeborg's Fig. MM. ' 1131. Alona intermedia. 166(151) With oblique Striae Alonella karua Turn to the key at the number indicated where the species named is discussed. 232 167 (137) Rostrum broad, semicircular Graptoleberis Sars 1863. Sole species Graptoleberis iestudinaria (Fischer) 1848. Posterior margin with 2 strong teeth at infero-posteal angle; valves and head with conspicuous reticulation. Head large; fornix very broad, forming a semicircular rostrum, covering anteimules and extend- ing down as far as ventral margin of valves. Post-abdomen bent at the sharp pre-anal angle; tapered toward claws, so that form is nearly triangular; marginal spines small; lateral fascicles minute, some- times wanting. Claws small, with i mi- nute basal spine, sometimes wanting (var. inermis Birge); $ with long, slender post- abdomen, without spines; vas deferens opens on ventral side; claws very minute; hook of first foot slender. Length, 9, mm.; $, mm. or. 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 War
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
