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Show 542 DR. J. E. GRAY ON SPONGES. [May 9, 4. AMNISCOS. Sponge subgiobose. Spicules:-1. Fusiform. 2. Stellate ; stars subgiobose; rays many, short, conical, broad at the base. AMNISCOS MORUM. Tethya morum, O. Schmidt, Sp. Ad. p. 44, t. 3. f. 26. Hab. Corfu. 5. STELLETTA, O. Schmidt, Sp. Ad. p. 46 ; Suppl. i. Sponge globular or subglobular. Spicules of three kinds:-1. Stellate ; rays three to seven, slender. 2. Simple, fusiform. 3. Filiform, two- or three-hooked. 1. STELLETTA GRUBII, O. Schmidt, p. 46, t. 4. f. 2. B.M. 2. STELLETTA WAGLERI, O. Schmidt, p. 46, t. 4. f. 3. B.M. 3. STELLETTA BOGLTCII, O. Schmidt, p. 47, t. 4. f. 4. B.M. 4. STELLETTA DORSIGERA, O. Schmidt, Supp. t. 3. f. 6, 7. B.M. 6. PENARES. Sponge subglobular. Spicules:-1. Fusiform, smooth. 2. Stellate ; rays few, slender. 3. Elongate, end three-rayed; rays elongate, bifid, diverging. Like Irate, but without any siliceous ovisacs. PENARES HELLERI. Stelletta helleri, O. Schmidt, Supp. i. t. 3. f. 8. Hab. Adriatic. 7. ECIOMEMIA, Bowerb. B. S. i. p. 173. Sponge branched. Spicules:-1. Elongate, filiform, two- or three-hooked at the distal end. 2. Stars very small, two- or four-rayed ; rays cylindrical, blunt. ECIOMEMIA ACERVUS, Bowerb. ib. i. p. 173, f. 355 ; O. Schmidt, Supp. ii. t. 1. f. 10 (stars). See also- ? Eciomemia compressa, Bowerb. ib. ii. p. 57. Eciomemia ponderosa, Bowerb. ib. p. 56. 8. DERCITUS. Sponge massive, minutely hispid, flesh-like, dark purple. Spicules of three kinds :-1. Cylindrical, spined above, minute. 2. Stellate, three- or four-rayed ; rays thick, diverging. 3. Tricurvate, few in number. DERCITUS BUCKLANDI. Hymeniacidon bucklandi, Bowerb. ib. ii. p. 226, f. 43, 44. Hab. British Channel. |