1867.] DR. J. E. GRAY ON ZOANTHIN^. 239 



a portion of the dermal surface of an undescribed sponge from the 

 East Indies, having numerous depressed porous areas furnished with 

 stomata, Hke 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 attached ; the cells arising from a slender subcylin- 



drical base. 



6. Carolia. 



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. SeaAnem. 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. 



Be7-gia 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, con- 

 centrically 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 Iluanthos of Forbes (Ann. of Nat. Hist. v. 1840, p. 184, 

 t. 3. f. 1) and Peachia, Gosse (Trans. Linn. Soc. xxi. 267), may 



