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



4. Amniscos. 

 Sponge subglobose. Spicules: — 1. Fusiform. 2. Stellate ; stars 

 subglobose ; rays many, short, conical, broad at the base. 



Amniscos morum. 



Tetlnja morum, O. Schmidt, Sp. Ad. p. 44, t. 3. f. 26. 



Hub. Corfu. 



5. Stelletta, O. Schmidt, Sp. Ad. p. 46 ; Suppl. i. 



Sponge globular or subglobular. Spicules of three kinds: — 1 . Stel- 

 late ; rays three to seven, slender. 2. Simple, fusiform. 3. Fili- 

 form, two- or three-hooked. 



1. Stelletta grxjbii, O. Schmidt, p. 46, t. 4. f. 2. B.M. 



2. Stelletta wagleri, 0. Schmidt, p. 46, t. 4. f. 3. B.M. 



3. Stelletta bogltcii, O. Schmidt, p. 47, t. 4. f. 4. B.M. 



4. Stelletta dorsigera, O. Schmidt, Supp. t. 3. f. 6, 7. B.M. 



^ 6. Penares. 



Sponge subglobular. Spicules: — 1. Fusiform, smooth. 2. Stel- 

 late ; rays few, slender. 3. Elongate, end three-rayed ; rays elon- 

 gate, bifid, diverging. Like Irate, but without any siliceous ovisacs. 



Penares helleri. 



Stelletta helleri, O. Schmidt, Supp. i. t. 3. f. 8. 

 Hub. Adriatic. 



7. EcioMEMiA, Bowerb. B. S. i. p. 173. 



Sponge branched. Spicules: — 1. Elongate, fiUform, two- or 

 three-hooked at the distal end. 2. Stars very small, two- or four- 

 rayed ; rays cylindrical, blunt. 



EciOMEMiA ACERVUS, Bowerb. ib. i. p. 173, f. 355 ; O. Schmidt, 

 Supp. ii. t. 1. f. 10 (stars). 



See also — 



1 Eciomemia compressa, Bowerb. ib. ii. p. 57. 



Eciomemia ponderosa, Bowerb. ib. p. 56. 



8. Dercitus. 



Sponge massive, minutely hispid, flesh-like, dark purple. Spicules 

 of three kinds : — 1. Cylindrical, spined above, minute. 2. Stellate, 

 three- or four-rayed ; rays thick, diverging. 3. Tricurvate, few in 

 number. 



Dercitus bucklandi. 



Hymeniacidon bucJdandi, Bowerb. ib. ii. p. 220, f. 43, 44. 

 Hab. British Channel. 



