244 Proceedings of the Royal Society of Victoria. 



Cliali/ia viridis, n. sp. 



Sponge composed of slender, irregular, cylindrical or sub- 

 cylindrical branches, with smooth surface and numerous small 

 vents which may be scattered or serial. Texture (in spirit) 

 compressible and resilient. Colour (in spirit) dark brown ; when 

 alive dark green. 



Skeleton, a network of rather slender horny fibres cored with 

 slender oxea, and sometimes with numerous spicules scattered 

 between the fibres in the soft tissue. The entire skeleton is fre- 

 quently interrupted by the large canals, which gi\e a very charac- 

 teristic mottled appearance to sections. Between these interrup- 

 tions the skeleton net is close-meshed. Towards the surface the 

 meshes are sub-rectangular and little more than one spicule's 

 length in width ; in the interior of the sponge they are very 

 irregular. The primary fibres at first run longitudinally in the 

 central portion of the sponge, and branching dendi-itically cur\e 

 outwards to the surface ; they are multispicular and about 0-02 

 nnn. thick. The secondary, connecting fibres are nearly as thick 

 but mostly unispicular. 



The dermal skeleton is a close network with polygonal meshes, 

 formed by fibres resembling the secondaries of the main skeleton. 



Spicules, short, straight (or slightly curved), slender oxea, 

 gradually sharp-pointed at each end ; measuring when full sized 

 about 0-058 by 0-0028 mm. 



Spirit specimens of this sponge are very insignificant looking, 

 but the dark green colour in life, changing to dark brown in 

 spirit, appears to be characteristic. As regards skeletal characters 

 I do not think that the species could be distinguished from 

 Chalina polychotoma. of which perhaps it is only a variety. 



R.N. 333 (18 f; "dark rifle green"); 572 (x, 19 f; "parrot 

 green"'); 744 (x, B; "riflegreen"). 



Chalina perga/nentacca, Ridley, sp. 



Chalina perganientacea, Eidley and Dendy, Challenger Monax- 

 onida, p. 27 (previous references given here). 



Ceraochalina papillata, Lendenfeld, Zoologischer Jahrljucher, 

 V..1. ii., p. 779 (1887). 



