506 DR. J. E. GRAY ON SPONGES. l^^^}' 9, 



cipal rays diverging on all sides, and divided near the base into 

 several elongated cylindrical linear rays, which diverge from each 

 other, and are tipped with a small apical knob like the head of a 

 pin (see Bowerb. Brit. Spon. t. 8. f. 190-192). 



1. Dactylocalyx pumicea. (PI. XXVII. fig. 2.) B.M. 



Baetylocalyx jpumiceus, Stutchbiiry, P. Z. S. 1841, p. 80; Bowerb. 

 B. Sp. i. p. 204 ; ii. p. 11. f. 190, 191, 198, 27.o (skeletons). 



Iphiteon panicea, Valenc. Mus. Paris; Bowerb. B. Sp. f. 190, 

 191, 192, 275, 340, 341 (skeletons and gemmules). 



Sponge broad, expanded ; upper surface rather concave. 

 Hah. West Indies: i^^xh^i^iO^^ (^Stutchhiry) ; St. Vincent's, AVest 

 Indies {Mr. Inc/all). 



2. Dactylocalyx suBGLOBOSA. (PL XXVII. fig. 1.) B.M. 



Sponge subglobose, with a deep central concavity above ; the outer 

 surface with irregular anastomosing oscules. 

 Hah. IMalacca? 



3. Dactylocalyx prattii, Bowerb. B. Sp. i. p. 204. f. 52, 276, 

 278, 306 (spicular network). 



Skeleton smooth in j)art, with crowded groups of tubercle?, and with 

 stellate spicules in the dermal surface (see Bowerb. B. Sp. i. p. 52). 

 Hah. ? 



2. Myliusia, Gray, P. Z. S. 1859, p. 439, t. 16. 



The sponge conical, cup-shaped, ])ierccd with numerous short 

 truncated tubes, forming raised foldc.d anastomosing lamina on the 

 lower surface. 



Myliusia callocyathes. Gray, P. Z. S. 1859, p. 439, Radiata, 

 pi. XVI. ' B.M. 



Hah. West Indies. 



Var. ? In the British Museum there is a second specimen of a 



smaller size, very irregular in form, which is perhaps a second species. 



Hah. West Indies. B.M. 



Lithospongia torva, Duchass. & Micliel. Spong. Caraib. j). 64, 

 t, 12. f. 3, 4, from the West Indies, appears to be a species of this 

 family, with a skeleton of netted siliceous fibres with wide angular 

 meshes and without any spines. 



There are two smaller specimens in the British Museum which 

 probably belong to the same species. The smaller one was collected 

 by the Kev. L. Guilding at St. Vincent in 1840 ; and the other was 

 received from the West Indies by Mr. Scrivener in 1842. 



3. MacAndrewia, Gray, P. Z. S. 1859, p. 438, t. 15. 



The coral expanded, cyathiform ; the upper and lower surface 

 smooth, the upper surface with small oscules ; fibres of skeleton small. 



