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



so that the rays alternate ; the rays flat, short, broad, truncated, with 

 two, three, four, or rarely five subequal acute lobes at the ends. 



AXOS CLIFTONII. 



Sponge, Bowerb. B. S. i. p. 260, f. 197. 

 Hab. Austraha, Nichol's Bay ((?. Clifton). 



See Sanins anonyma, BovAerb. B. S. f. 41, 42, in Clionidce. 



23. ACHINOE. 



Sponge ? Spicules stellate, three-rayed ; rays much larger 



than the small central body, with one or more whorls of acute coni- 

 cal tubercles. 



AcHiNOE AusTRALis, Bowcrb. B. S. i. p. 268, f. 235, 236. 



Hab. West Australia, Freemantle. 



See also Bowerbank's Brit. Sponges, f. 166. South Seas. 



24. Cyamon. 



Sponge ?, spiculose. Spicules stellate, three- or four-rayed ; 



rays from a central point, cylindrical, blunt, minutely spined all 

 over. 



Cyamon vickersii. 



Dictyocylindrus vickersii, Bowerb. B. S. i. p. 267, f. 234. 



Hab. West Indies. 



See also a parasitic sponge, Bowerb. ib. p. 242, f. 88. 



25. SOLINA. 



Sponge ? Spicules stellate, three-rayed ; rays from a central 



point, elongate, cylindrical, blunt, with regular whorls of many small 

 spines. 



SoLTNA elegans, Bowcrb. B. S. i. p. 241, f. 84. 

 Hab. Indian Ocean ? 



26. ?EuRYADES, Duchass. & Michelotti, Sp. Caraibe, p. 106. 



Sponge subglobose, lobed, horny, reticulated, with large concave 

 central oscules. Spicules large, tricuspid, rays acute. 



EuRYADES NOTABiLis, Duchass. & Michcl. ib. p. 206, t. 25. f. 3. 

 Hab, West Indies, St. Thomas's. 



Order V. ARENOSPONGIA. 



Sponge consisting of a disk of agglutinated sand, with a series of 

 diverging spicules on the circumference of the disk, and a pencil of 

 similar spicules at the mouth of the oscules on the upper surface of 

 the disk. 



