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Show 1867.] DR. J. E. GRAY ON SPONGES. 519 R. semitubulosa, O. Schmidt, ib. p. 75. ? Spongia semitubulosa, Lamk. B.M. R. luxurious, O. Schmidt, ib. p. 76. B.M. 2. HALICHONDRIA. Skeleton irregularly netted, scattered, or reticulated. Spicules uniform, fusiform. HALICHONDRIA PANICEA, Johnston; Bowerb. Brit. Sp. p. 229, f. 300, 303. See also- H. servosa, Johnston. H. glabra, Bowerb. ib. p. 232. H. caduca, Bowerb. ib. p. 234. H. inconspicua, Bowerb. ib. p. 236. H. incerta, Bowerb. ib. p. 237. H. coalita, Johnst. t. 12. f. 1 ; Bowerb. ib. p. 238, H. simplex, Bowerb. ib. p. 246. H. subdola, Bowerb. ib. p. 247. H. jurinaria, Bowerb. ib. p. 269 (spicules spined). H. distorta, Bowerb. ib. p. 240 (spicules fusiform and needle-like). 3. DICTYOCYLINDRUS. Sponge arborescent; branches large, forked, rather hispid ; skin without spicules. Skeleton of fasciculated spicules. Spicules:- 1. Needle-shaped or fusiform, long, slender. 2. Needle-like or sub-pin- like, spinose. Dictyocylindrus, Bowerb. B. S. i. p. 185. 1. DICTYOCYLINDRUS HISPIDUS, Bower. B. S. i. p. 185, ii. p. 108. Spongia hispida, Mont. 2. D. VENTILABRUM, Bowerb. ib. ii. p. 100, f. 66. 3. D. RAMOSUS, Bowerb. ib. ii. p. 103, f. 366. 4. D. PUMILUS, Bowerb. ib. ii. p. 114. 5. D. RUGOSUS, Bowerb. ib. ii. p. 119, f. 369. And other species described by Dr. Bowerbank. 4. AAPTOS. Sponge fleshy, internally spiculose. Spicules all needle-shaped, elongate, smooth (no anchorate spines, or globules, or stars). AAPTOS ADRIATICA. B.M. Ancorina aaptos, O. Schmidt, Supp. i. p. 33, t. 4. f. 4. Hab. Adriatic. |