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



5. Halisarca. 



Sponge expanded, smooth, gelatinous. Spicules of two kinds : — 

 1. Cylindrical, very slender, flexuous. 2. Slender, needle-like, spi- 

 nose. 



Halisarca dujardinii, Johnston. B.M. 



Hymeniacidon dujardinii, Bowerb. B. S. ii. p. 224. 



6. LlEBERKUHNIA. 



Sponge funnel-shaped, turbinate or globose. Texture entirely re- 

 ticulated. Spicules small, slightly arched, j)ointed at each end, 

 placed in series forming the fibres. 



Lieberkuhiia, Balsamo-Crivelli, 1863; O. Schmidt, Supp. i. 

 p- 43. 



LlEBERKUHNIA AGAGROPHLA, BalsamO, /. C. B.M. 



Jjieherhihnia calix, O. Schmidt, Supp. ii. p. 43. 



Espera calix, Nardo. 



Beniera calix, O. Schmidt, i. p. 76, t. 7. f. 12. 



7. Tedania. 



Sponge lobed, crested, with a lateral tube ending in an open mouth. 

 Spicules of three kinds : — 1. Clavate, needle-shaped. 2. Fusiform, 

 very slender, elongate, sometimes flexuous. 3. Cylindrical, with 

 rather thicker, blunt ends. 



1. Tedania digitata. B.M. 

 Reniera digitata, O. Schmidt, p. 75, t. 7. f. 1 1. 



2. Tedania ambigua. 



Reniera ambigua, O. Schmidt, Supp. ii. t. 4. f. 8. 



8. Oroidea. 



Sponge massive. Spicules cylindrical, with regular whorls of 

 spines, truncated and torn at one end, and attenuated and pointed 

 at the other. 



Oroidea adriatica. B.M. 



Clathria oroides, O. Schmidt, Sp. Adriat. Supp. i. t. 4. f. 2. 



9. Prianos. 



Sponge massive. Spicules of two forms:—!. Cylindrical, blunt 

 and rounded at each end. 2. Cylindrical, slender, angularly bent 

 in the middle. 



Prianos amorphus. B.M. 



Reniera amorpha, O. Schmidt, Supp. i. t. 4. f. 7. 



