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Show 544 DR. J. E. GRAY ON SPONGES. [May 9, 13. TlMEA. Sponge-coating thin, hispid. Skin spiculose. Spicules of four forms: - 1. Cylindro-stellate, very minute in the skin. 2. Pin-shaped, large, long, fasciculated. 3. Needle-shaped. 4. Very slender, pin-shaped. TlMEA STELLATA. Hymedesmia stellata, Bowerb. B. S. ii. p. 150. 14. ACARNUS. Sponge reticulate. Spicules:-I. Cylindrical, fasciculated. 2. Cylindrical, forming radiating groups, with stellate four-rayed ends ; rays short, recurved. ACARNUS INNOMINATUS. Sponge, Bowerb. B. S. i. pp. 23, 33, 122, f. 292. Hab. ? 15. FONTEIA. Sponge ? Spicules of four kinds : - 1 . Subcylindrical, rather clavate at each end. 2. Cylindrical, with a pin-like head at each end. 3. Cylindrical, with a pin-like head at one end, and four short recurved hooks at the other. 4. Cylindrical, clavate at one end, and with four recurved hooks at the other. FONTEIA ANOMALA, Bowerb. ib. f. 73-76. Hab. ? IV. Sponge with stellate spicules in the skin or sarcode, without internal or external tricurvate spicules. * Sponge massive. 16. PUMEX. Sponge massive, subgiobose, fleshy. Spicules:-1. Fusiform, slender, smooth. 2. Subulate, spinulose, tapering from the flat head. 3. Stellate, rays many, slender. PUMEX ADRIATICUS. B.M. Tethya pumex, Nardo. Stelletta pumex, O. Schmidt, Supp. i. t. 3. f. 9. 17. CORTICIUM, O. Schmidt, Sp. Ad. p. 42. Sponge oblong, globose, smooth. Outer surface dense, fibrous; inner gelatinous, both spiculose. Spicules of two kinds:-1. Stellate, three- or four-rayed ; rays slender. 2. Many-rayed, like a candelabrum. CORTICIUM CANDELABRUM, O. Schmidt, p. 42, t. 3. f 25- Sunn ii. 1.1. f. 2. ' B*i4 |