OCR Text |
Show 1867.] DR. J. E. GRAY ON SPONGES. 545 18. CHONDRILLA, O. Schmidt, S. A. p. 39 ; Suppl. i. p. 36. Sponge oblong or lobed. Outer surface formed of very closely compacted fibres. Spicules stellate. CHONDRILLA EMBOLOPHORA, O. Schmidt, p. 39, t. 3. f. 23, 23a. B.M. C H O N D R I L L A NUCULA, O. Schmidt, p. 39, t. 3. f. 22, 22a. B.M. ** Sponge branched. 19. STELLIGERA. Sponge branched, forked, flexible; surface stellate. Spicules united by a horny substance, netted, of four shapes :-1. Pin-shaped, smooth. 2. Needle-shaped, smooth. 3. Cylindrical, elongate, blunt at each end. 4. Spherical, stellate, with many acute rays (on surface). STELLIGERA FURCATA. Raspailia stelligera, O. Schmidt, p. 60, t. 5. f. 11. 20. VIBULINUS. Sponge arborescent, branched, forked and reforked; surface spiculose. Spicules :-1. Fusiform, needle-shaped, long, slender, often fasciculated. 2. Stellate, spherical, or rather elongate, with numerous acute rays, minute. VIBULINUS STUPOSUS. B.M. Spongia rigida, Montag. $. stuposa, var. damicenus, Mont. Halichondria rigida et H. cervicornis, Johnst. Dictyocylindrus stuposus, Bowerb. B. S. i. p. 109, ii. p. 116, f. 208. Hab. England. See also- V. aculeatus = D. aculeatus, Bowerb. ib. ii. p. 109. 21. ADREUS. Sponge arborescent, branched; branches forked, smooth. Spicules abundant:-1. Needle-shaped, slender, often flexuous. 2. Needle-shaped, stout, in radiating bundles. 3. Stellate, minute in the sarcode. ADREUS FASCICULARIS. B.M. Dictyocylindrus fascicularis, Bowerb. B. S. ii. p. 111. Hab. English coast. 22. Axos. Sponge branching, reticulated. Spicules stellate, nearly uniform in size, formed of two flat three-rayed stars placed one on the other PROC. ZOOL. Soc-1867. No. XXXV. |