. Fresh-water biology. Freshwater biology. Fig. 569. Ephydaiia japonica. Gemmule, X i8; birotulates, X 120; skeleton'spicules, X 120. (After Amiandale.) 30 (27) Skeleton spicules microspined except at tips. Ephydatia millleri (Lieberkiihn) 1856. Sponge cushionlike, rarely branched. Vesicular cells abundant in the parenchyma. Dermal spicules wanting. Shafts of gemmule birotulates not, or barely, longer than diameter of rotules. Rotules deeply indented. Eastern and Central United States; Nova Scotia; Newfoundland; Vancouver Island. Found by F. Smith at Douglas Lake, Mich., and Tolland, Col. Fig.
. Fresh-water biology. Freshwater biology. Fig. 569. Ephydaiia japonica. Gemmule, X i8; birotulates, X 120; skeleton'spicules, X 120. (After Amiandale.) 30 (27) Skeleton spicules microspined except at tips. Ephydatia millleri (Lieberkiihn) 1856. Sponge cushionlike, rarely branched. Vesicular cells abundant in the parenchyma. Dermal spicules wanting. Shafts of gemmule birotulates not, or barely, longer than diameter of rotules. Rotules deeply indented. Eastern and Central United States; Nova Scotia; Newfoundland; Vancouver Island. Found by F. Smith at Douglas Lake, Mich., and Tolland, Col. Fig. 570. Spicules of Ephydatia miiUeri. Three types of spicules figured here: skeleton spicules, X 120; birotulate gemmule spicules; same mal- formed; group of rotulae; single rotules showing an ordinary distribution of the rays. X 250. (After Potts.). 31 (26) Shafts of birottilates with enormous spines. Ephydatia rohusta (Potts) 1887. Sponge massive, encrustin,g, thin. Gemmules scarce. Skeleton spicules pointed, smooth. Birotulates large, generally malformed. Shafts abounding in spines as long as rays of the rotules. Collected near Susanville, California. Perhaps only a variety of E. ftuviatilis. Fig. 571. Spicules of Ephydatia rohusta. Three types of spicules figured here: smooth skeleton spicules; coarsely spined gemmule birotulates; single rotules; exceedingly misshapen forms. X 100. (After Potts.). 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
