o48 DR. J. E. GRAY ON SPONGES. [May 9, 



2. Geodia, Lamk. Ann. Mus. i. p. 334 ; Schweigger, Beob. 



Sponge massive, with a central cavity covered with a netted or 

 perforated lid. Spicules elongate, with two or three recurved branches 

 at the outer end. 



1. Geodia gibberosa, Lamk. Ann. Mus. p. 334 ; Blainv. Man. 

 Act. p. 535, t. 91. f. 4 ; Duchass. & Michel. Sp. Car. p. 105, t. 26". 

 f. 1. 



G. tuberosa, Schweig. Beob. t. 11. f. 18, 19. B.M. 



Hab. West Indies. 



2. Geodia caribea, Duchass. & Michel. Sp. Car. p. 105, t. 25. 



f. 8. 



Hab. West Indies. 



3. Cydonium, Fleming, Brit. p. 516. 



Geodia, sp., Johnst. B. S.p. 195; Bowerb.B. S. i. p. 168, ii. p.45; 

 O. Schmidt, S. A. Supp. ii. p. 11. 



Sponge massive, without any central cavity, permeated by sinu- 

 ous canals. Ovisacs forming an interrupted external covering to the 

 sponge. Spicules of three forms: — 1. Elongate, with two or three 

 diverging branches at the outer end. 2. Stellate, minute. 3. Fu- 

 siform, subulate, slender, sometimes extending beyond the surface. 



1. Cydonium barretti. 



Geodia baretti (C. barretti), Bowerb. B. S. i. pp. 1/1, 236, f. 54- 

 58, 162, 250, 301, 302, 354. 



Hab. Atlantic {Mac Andrew). B.M. 



2. Cydonium muelleri?, Fleming, B. A. p. 516. 

 Alcyonium rmUeril, Jameson, Wern. Mem. i. p. 363. 



Geodia zetlandica, Johnston, B. S. p. 193, t. 3. f. 3, 4 ; Bowerb. 

 B. S. ii. p. 45. 



Hab. North Sea. B.M. 



See also — 



Geodia macandrewii, Bowerb. ib. i. p. 235, f. 47, 254, 325-329 ; 

 O. Schmidt, Supp. ii. t. 1. f. 9. 



G. V.carinata, Bowerb. ib. i. p. 239, f. 71, 163 ; Phil. Trans. 1858, 

 p. 314, t.36. f.42. 



G. placenta, O. Schmidt, p. 49, t. 4. f. 7. 



G. gigas, O. Schmidt, p. 50, t. 4. f. 8, 9 ; Supp. ii. t. 1. f. 3. B.M. 



G. tuberosa, O. Schmidt, p. 50, t. 4. f. 10. 



Cr. conchilega, O. Schmidt, p. 51, t. 4. f. 11. 



See also — 



1. Tethea robusta, Bowerb. B. Sp. i. pp. 51, 52, 231, f. 18, 

 160, 165, 167. 



Hab. AustraUa (5W/. M»/*. ; S.Stutchbvrif). 



