. Fresh-water biology. Freshwater biology. Fig. 581. Carterius tubisperma. A. Partial section of gemmule; (a), Foraminal aperture prolonged into a long tubule flaring and funnel-shaped at its extremity and divided into several short tendrils id) or cirrous appendages. (6), birotulate spicules. X 50. (After Potts.) B. Three types of spicules figured here: skeleton spicules; gemmule birotulates; face of rotule; long spined slender dermal acerates. X 100. (After Potts.) 49 (48) so) Foraminal tubule shorter; tendrils, one or two, enveloping the tubule Carterius latitenta Potts 1881. Sponge often e
. Fresh-water biology. Freshwater biology. Fig. 581. Carterius tubisperma. A. Partial section of gemmule; (a), Foraminal aperture prolonged into a long tubule flaring and funnel-shaped at its extremity and divided into several short tendrils id) or cirrous appendages. (6), birotulate spicules. X 50. (After Potts.) B. Three types of spicules figured here: skeleton spicules; gemmule birotulates; face of rotule; long spined slender dermal acerates. X 100. (After Potts.) 49 (48) so) Foraminal tubule shorter; tendrils, one or two, enveloping the tubule Carterius latitenta Potts 1881. Sponge often encrusting stones in rapidly running water. Gemmules numerous. Cirrous ap- pendages at first flat and ribbon-like, becoming slender and rounded, and occasionally subdivid- ing. Skeleton spicules smooth: or sparsely microspined, gradually pointed. Dermal spicules long, entirely spined. Birotulates stout, shafts with numerous long pointed spines. Rays of rotules deeply cut and sometimes recurved. Annandale believes this and the following spedes should be assigned to Ephydatia. In Pennsylvania, western New York, and Illinois 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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