544 DR, J. E, GRAY ON SPONGES. [May 9, 



13. TiMEA. 



Sponge-coating thin, hispid. Skin spiculose. Spicules of four 

 forms: — 1. Cylindro-stellate, very minute in the skin, 2. Pin- 

 shaped, large, long, fasciculated. 3. Needle-shaped. 4. Very 

 slender, pin-shaped. 



TiMEA STELLATA. 



Hymedesmia stellata, Bowerb. B. S. ii. p. 150. 



14. ACARNUS. 



Sponge reticulate. Spicules: — I. Cylindrical, fasciculated. 2. 

 Cylindrical, forming radiating groups, with stellate four-rayed ends ; 

 rays short, recurved. 



AcARNUS INNOMINATUS. 



Sponge, Bowerb. B. S. i. pp. 23, 33, 122, f. 292. 

 Hab. ? 



15. FONTEIA. 



Sponge ? Spicules of four kinds : — 1. Subcylindrical, rather 



clavate at each end. 2. Cylindrical, with a pin-like head at each 

 end. 3. Cylindrical, with a ])in-like head at one end, and four short 

 recurved hooks at the other. 4. Cylindrical, clavate at one end, 

 and with four recurved hooks at the other. 



FoNTEiA ANOMALA, Bowcrb. ib. f. 73-/6. 

 Hab. ? 



IV. Spovr/e with stellate spicules in the skin or sarcode, ivithoiit any 

 internal or external tricurvafe spicules. 



* Sponge massive. 



16. PUMEX. 



Sponge massive, subglobose, fleshy. Spicules: — 1. Fusiform, 

 slender, smooth. 2. Subulate, spinulose, tapering from the flat head. 

 3. Stellate, rays many, slender. 



PUMEX ADRIATICUS. B.M. 



Tethya pumex, Nardo. 



Stelletta pumex, O. Schmidt, Supp. i. t. 3. f. 9. 



17. CoRTiciuM, O. Schmidt, Sp. Ad. p. 42. 

 Sponge oblong, globose, smooth. Outer surface dense, fibrous ; 

 inner gelatinous, both spiculose. Spicules of two kinds: — 1. Stel- 

 late, tliree- or four-rayed ; rays slender. 2. Many-rayed, like a can- 

 delabrum. 



CoRTiciUM CANDELABRUM, O. Schmidt, p. 42, t. 3. f. 25; Supp. 

 ii. t. l.f. 2. B.M. 



