52f) DR. J. E. GRAY ON spoNGKS. [May 9, 



4. Sapline. 



Spicules of two kinds : — 1 . Pin-shaped, elongate, smooth. 2. Fusi- 

 form, smooth. 



Sapline grantii, B.M. 



Fioa grantii, O. Schmidt, p. 7S, t. /. f. 15. 

 Hab. Adriatic. 



5. Idomon. 



Spicules of two kinds, angularly bent in the centre: — I. Pin- 

 shaped, head small. 2. Needle-shaped, one end truncate. 



Idomon alderi. 



Cliona alderi, Hancock, I. c. 



6. Jaspis. 

 Spicules of two kinds : — 1. Fusiform. 2. Stellate. 



Jaspis johnstonii. 



Vioa johnstonii, O. Schmidt, p. 78, t. 7. f. 17. B.M. 



Hab. Adriatic Sea. 



7. Pronax. 



Spicules of two kinds: — 1. Pin-shaped, head sub terminal. 2. Cy- 

 lindrical, bent or sinuous, smooth or spinose. 



Pronax lobata. 



Cliona lobata^ Hancock, I. c. p. 239, t. 7. f. G (bent spicules spi- 

 nose). 



Hab. Newcastle-ou-Tyne. 



See also, with bent spicules smooth — 

 Cliona vermifera, Hancock, I. c. t. 8. f. 2. 

 C. alderi, Hancock, p. 239. 



8. Samus. 

 Spicules of one kind, thick, stellate, many-rayed ; rays in several 



Samus anonyma, Bowerb. B. S. p. 234, t. 2. f. 41, 42. 

 See Axus cliftoni (Bowerb. B. S. f. 197) in Tethyidce. 



See also — 



Vioa duvernoyii, Duchass. Anim. Radiat. p. 27; Spong. Mer 

 Caraibe, p. 117, t. 25. f. 4. 



V. dissociata, Duchass. ib. p. 27 ; Sp. Mer Car. p. 117, "t. 22. 

 f. 5,6" (t. 25. f. 5, 6?). 



V. strombi, Duchass. Sp. Mer Car. p. 113. 



Also the genus Em-yphylle, which perforates the substance of 

 madrepores, forms irregular galleries with granules and spicules. 



