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Show 1867.] DR. J. E. GRAY ON SPONGES. 521 10. SCHMIDTIA. Sponge tuberose, or tuberoso-elongate, more or less pedunculate, single, or two or three coalesced, with a central tube internally hollow. Parenchyma more or less netted. Spicules of five forms, all smooth:-1. Thick, needle-shaped. 2. Fusiform. 3. Slender fusiform, thick. 4. Subcylindrical, curved, blunt. 5. Longer, pointed, angularly bent at the end. Schmidtia, Balsamo-Crivelli; O. Schmidt, Suppl. i. p. 42. SCHMIDTIA FICIFORMIS. Schmidtia ficiformis, S. clavata, et S. dura, Balsamo-Crivelli, Mem. Soc. Italiana, 1863, vol. v.; O. Schmidt, Supp. i. p. 42. Reniera Idura, O. Schmidt, i. p. 76, t. 7. f. 13. B.M. 11 CRELLA. Sponge crustaceous, tubercular; pores confined in wedge-shaped areas. Spicules of two kinds:-1. Fusiform. 2. Club-shaped, nodose. Cribrella, O. Schmidt, p. 70 (not Agassiz). CRELLA ELEGANS. Cribrella elegans, O. Schmidt, p. 70, t. 7. f. I, 12. SOPHAX. Sponge-coating rough ; oscules minute, dispersed. Skin spinulose. Spicules :-1. Needle-like, long, slender, flexuous. 2. Needlelike, minutely spined. SOPHAX FALLAX. Microciona fallax, Bowerb. B. S. ii. p. 128. 13. EPICLES. Sponge-coating thin, smooth. Skin pellucid, without spicules. Spicules of two forms :-1. Needle-like, slender, in widely radiating groups. 2. Subclavate, smooth or covered with minute spines. EPICLES RADIATUS. Hymedesmia radiata, Bowerb. B. S. ii. p. 149. 14. EURYPON. Sponge-coating hispid. Skin spiculated. Spicules of two kinds :- 1. Needle-like, long, slender, smooth. 2. Subclavate, spinulated all over. EURYPON CLAVATUM. Hymeraphia clavata, Bowerb. B. S. ii. p. 143. 15. BUBARIS. Sponge-coating cavernous, hispid. Skin spiculose. Spicules of two |