OCR Text |
Show 1867-] DR. J. E. GRAY O N SPONGES. 535 9. EMPLOCUS. Sponge incrusting, parasitic on Sertularia. Spicules of four kinds:-1. Cylindrical, pin-shaped, both ends truncated, torn, smooth. 2. Cylindrical, slightly tubercular, with one or three diverging conical points at.one end, and irregularly truncated at the other. 3. Cylindrical, curved, rather swollen, rounded at the ends, with two elongate spines at each side of ends. 4. Equibianchorate, two-pointed at each end. EMPLOCUS TRIDENS. Myxilla tridens, 0. Schmidt, Supp. t. 4. f. 5. B.M. 10. ANCHINOE. Sponge-coating thin, smooth. Oscules slightly elevated. Skin spiculose. Spicules:-1. Fusiform, large, long. 2. Clavate, slender, entirely spined, of various sizes. 3. Equianchorate, bi- or tridentate. ANCHINOE PERARMATUS. Hymeniacidon perarmatus, Bowerb. B. S. p. 164. 11. MICROCIONA, part., Bowerb. ib. i. p. 188, ii. p. 124. Sponge thin; coating with columns of spicules that radiate from the axis in every direction. Spicules of three kinds :-1. Subclavate. 2. Needle-shaped, spined. 3. Equianchorate, bidentate (or dentato-palmate). Scopalina, O. Schmidt. MICROCIONA SPINULENTA, Bowerb. B. S. p. 132. See also- M. armata, Bowerb. ib. p. 129. M. fictitia, Bowerb. ib. p. 124. M. carnosa, Bowerb. ib. p. 133. M. atrosanguinea, Bowerb. ib. p. 138. Scopalina lophyropoda, O. Schmidt. ' B.M. 1M. ambigua, Bowerb. ib. p. 136 (end of anchorate spicules sometimes dentato-palmate). 12. DENDORYX. Sponge massive, irregularly reticulated. Spicules of four kinds :- 1. Fusiform or cylindrical, pointed at each end, smooth. 2. Needlelike, spinulose all over. 3. Equibianchorate, three-spined at each end. 4. Bihamate. DENDORYX INCRUSTANS. Halichondria incrustans, Bowerb. ib. p. 249, f. 28, 92, 110, 111, 373 ; O. Schmidt, Supp. ii. t. 1. f. 17. See also- II. thompsoni, Bowerb. B. S. p. 243. |