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Show 1867.] DU. J. E. GRAY ON ZOANTHIN^*. 239 a portion of tbe dermal surface of an undescribed sponge from the East Indies, having numerous depressed porous areas furnished with stomata, like protective organs. Mr. Tyler, F.L.S., has kindly shown me some specimens of the sponge mounted, as a transparent and as an opake object; and they are very like a parasitic actinioid polype ; but the rays are strengthened with spicules on the surface, and on the tips with some prominent ones (which form a pencil), unlike any Actinia I have seen, and so they are perhaps sponges. If so, they ought to form a genus, which may be called Astrostoma. III. The coral attacked; the cells arising from a slender subcylindrical base. 6. CAROLI A. The base slender, subcylindrical, creeping; the cell cylindrical, separate, and far apart from the base. CAROLIA COUCHII. Zoanthus couchii, Johnston ; Couch, Cornish Fauna, iii. 73, t. 15. f. 3; Johnston, Brit. Zoophytes, 202, t. 35. f. 9 (cop. Couch); Holdsworth, P. Z. S. 1858, p. 557, t. 10. f. 4-7 (not fig. 3). Zoanthus couchii, var. linearis, Gosse, Brit. Sea Anem. 298, t. 10. f. 5. Hab. Cornwall. IV. Polypes forming a network, sunk in sponges; the buds arising the upper or cephalic edge. 7. BERGIA, Duchass. & Michellot, Coral, des Antilles, 54, 1860. Alcyonium, sp., Lamk. BERGIA SERPENS. Alcyonium serpens, Lamk. Bergia catenularis, Duch. & Michel. 54, t. 8. f. 12. Hab. West Indies. B.M. V. Polypes attached, solitary, with a rather expanded base. 8. TRIGA. The coral subcylindrical, solitary, attached, with a rather expanded base; outer coat coriaceous, sandy, concentrically wrinkled. TRIGA PHILIPPINENSIS. B.M. Coral subcylindrical, clavate, rather narrowed near the base, concentrically wrinkled; end convex, obscurely radiately striated. Hab. Philippines, attached to small pebbles (Cuming). The coral varies from an inch to an inch and a half in length. The genera Jluanthos of Forbes (Ann. of Nat. Hist. v. 1840, p. 184, t. 3. f. 1) and Peachia, Gosse (Trans. Linn. Soc. xxi. 267), may |
