. Animal biology. Biology; Zoology; Physiology. Flagellum Collar - Jdim. B Fig. 35. - - A, small colony of Leucosolenia; B, a collar cell; C, Grantia. manently attached at the base to a rock just below low-tide mark. It is without the power of locomotion and does not visibly respond in any way when touched. However, if it is examined under a lens, it will be found that the whole surface of each sac-like body is dotted with innumerable pores, or ostia, through which water is being drawn into the gastral cavity and passed on out through a sieve-like membrane at the top, or osculum. The name of t
. Animal biology. Biology; Zoology; Physiology. Flagellum Collar - Jdim. B Fig. 35. - - A, small colony of Leucosolenia; B, a collar cell; C, Grantia. manently attached at the base to a rock just below low-tide mark. It is without the power of locomotion and does not visibly respond in any way when touched. However, if it is examined under a lens, it will be found that the whole surface of each sac-like body is dotted with innumerable pores, or ostia, through which water is being drawn into the gastral cavity and passed on out through a sieve-like membrane at the top, or osculum. The name of the phylum, Porifera, refers to the pores. (Fig. 35.) A section of the body wall of Leucosolenia shows that it is supported by a skeleton, composed of a network of three-pronged. 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 Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company
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