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



kinds: — 1. Needle-like, elongate. 2. Cylindrical or subfusiform, 

 vermiculoid, varying in the manner in which they are twisted. 



BUBARIS VERMICULARIS. 



Hymeraphia veimiculariSy Bowerb. B. S. ii. p. 141, f. 5. 



16. ClOCALYPTA. 



Sponge cylindrical, massive, with numerous attenuated branches, 

 sometimes forked at the tips. Skeleton of compact interlaced spi- 

 cules, which divide into fasicules near the surface of the branches ; 

 the fascicules dilated at the end supporting the outer surface, and 

 having a series of small cavities below the outer coat. Spicules fusi- 

 form or needle-like, stout, variable in size. 



Ciocalypta, Bowerb. B. S. i. p. 179, ii. p. 81, t. 30. f. 360, 361. 



ClOCALYPTA PENiciLLUs, Bowerb. B. S. i. p. 188, ii. p. 81. 



17. Rasalia. 



Sponge incrusting or arborescent, branched. Spicules of two 

 kinds, united by a horny matter: — 1. Needle-shaped, thick, tuber- 

 cular. 2. Pin-shaped, smooth. 



Rasalia viminalis. 



Raspalia viminalis, O. Schmidt, p. 59, t. 5. f. 12. B.M. 



18. Adocia. 



Sponge sessile or branching and inosculating, smooth ; oscules on 

 the sides of the branches. Skin without spicules. Skeleton rather 

 irregularly netted. Spicules fusiform, stout, short. 



Adocia simulans. 



Isodictya simulans, Bowerb. B. S. p. 308, f. 299. 



19. Philotia. 

 Sponge incrusting, smooth ; oscules minute. Skin regularly netted, 

 spiculous. Spicules isolated, forming a network: — 1. Fusiform, 

 slender. 2. Cylindrical or needle-shaped. 



Philotia varians. 



Isodictya varians, Bowerb. B. S. ii. p. 281, f. 309. 



* * Spicules pin-shaped. 



20. Abila. 



Sponge branched, flexible. Spicules united with horny matter, 

 of three kinds:— 1. Pin-shaped, smooth; head rather marked, 

 large. 2. Pin-shaped, nodulous, small. 3. Fusiform, very slender, 

 arched or doubly arched. 



