. Fresh-water biology. Freshwater biology. 6 (3) Zooecia confluent; epistome present. Order Phylactolaemata. 7 7 (14, 15) Statoblasts without hooks, rounded at ends 8 8 (9) Stock branched in form of antlers; more rarely massed with recumbent and elevated tubes; mostly brown or incrusted with algae and grains of sand; rarely hyaline. Fredericella sultana Blumenbach 1774. Tubes cylindrical, the older ones mostly keeled. Without complete dissepiments. Apertures terminal at the broadened or bifid ends of tubes. Polypide very long and slender; tentacles arranged in a nearly circular corona. Few ten
. Fresh-water biology. Freshwater biology. 6 (3) Zooecia confluent; epistome present. Order Phylactolaemata. 7 7 (14, 15) Statoblasts without hooks, rounded at ends 8 8 (9) Stock branched in form of antlers; more rarely massed with recumbent and elevated tubes; mostly brown or incrusted with algae and grains of sand; rarely hyaline. Fredericella sultana Blumenbach 1774. Tubes cylindrical, the older ones mostly keeled. Without complete dissepiments. Apertures terminal at the broadened or bifid ends of tubes. Polypide very long and slender; tentacles arranged in a nearly circular corona. Few tentacles, not exceeding 24. Statoblasts dark brown, bean-shaped or elliptical, without float, and with smooth upper surface. Habitat on wood, stones and water plants m standing and slowly flowing waters. From Maine to Penn- sylvania, westward to Wisconsin and even Flathead Lake, Montana. Common in the Great Lakes. Fig. 1397. Fredericella sultana, (a) Portion of branch, natural size, (b) Polyp magnified. (After Hyatt.) (c) Statoblast. (After Kraepelin.). 9 (8) Colonies consist of cylindrical tubes, which are either branched or form massive clumps or run over the substratum as hyahne, lobed tubes Plumaiella Lamarck. 10 Partitions rudimentary or absent, cuticula brown to hyaline, often incrusted. Tentacular corona markedly horseshoe-shaped, with 40 to 60 tentacles. Intertentacular membrane present. Statoblasts without hooks; either free, elUptical, with broad float, or (in the horizontal tubes) without float, of large size and irregular shape. The commonest genus of our fresh-water Bryozoa. Has been reported from all continents ex- cept Africa. Lives in the most diverse habitats, in ponds or streams, usually not in the ligljt. 10 (13) Colony with vertical as well as horizontal branches 11. 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 rese
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
