1867.] DR. J. E. GRAY ON SPONGES. 539 



D. jeffreysii, Bowerb. ib. pp. 347-350. 

 Halichondria corrugata, Bowerb. ib. ii. p. 242. 

 H. Candida, Bowerb. ib. p. 251. 

 H. pidchella, Bowerb. ib. p. 256. 

 H. inornata, Bowerb. ib. p. 27. 



26. AsYCHis. 



Sponge ? Spicules of two forms: — 1. Fusiform, large. 



2. Fusiform, slender, bihamate, simple (and contorted), large, aud 

 small. 



1. ASYCHIS FIBULATA. 



Heniera jihxdata, O. Schmidt, p. 73, t. 7. f. 9. 



2. ASYCHIS VARIANTIA. 



Halichondria variantia, Bowerb. B. S. f. 11, 409. 

 Hymeniacidon varan fia, Bowerb. ib. p. 174. 



27. Dymntjs. 



Sponge ? Spicules: — 1. Simple, bihamate, with an umbo 



on the inner or outer, or on the inner and outer sides of the middle 

 of the shaft. 



Dymnus siculus. 



Sponge from Sicily, Bowerb. B. S. i. p. 247, f. 115-117. 



28. Damo. 



Sponge ? Spicules bihamate, each of the ends clavate, 



rounded, blunt (see Bowerb. B. S. f. 118, 119, 120). 



Damo biclavata. 



Sponge, Bowerb. ib. i. pp. 44, 247, f. 118-120. 



29. Abila. 



Sponge-coating smooth. Oscules minute, dispersed. Skin spi- 

 cnlose. Spicules of three kinds: — 1. Fusiform, long, slender, 

 smooth. 2. Fusiform, tricurvate, stout. 3. Fusiform, stout, broad, 

 spined. 



Abila l-evis. 



Microciona Icevis, Bowerb. ib. ii. p. 127. 



30. Orina. 



Sponge massive, smooth. Outer skin with a network of spicules. 

 Spicules of two kinds: — 1. Fusiform slender. 2. Fusiform trun- 

 cate. 



