90 ANTHEROOHALINA. — PLACOCHALINA. 



which measure 3 millim. in diameter. Surface quite smooth, without apparent 

 oscula. Sponge soft and resilient in the fresh state, hard when dry. STceleton- 

 net with meshes 0-13 millim. wide and fibres 0-016 millim. thick. Spicules : 

 oxea, 0-09 millim. long and 0-003 millim. thick. 



Geogeaphical Distbibxjtion. — East coast of AustraKa : Broughton Island, 

 Q. (Ramsay), 



Antherochalma frondosa, Lendenfeld. 



Antherochalina frondosa, ~R. v. Lendenfeld, " Die Chalineen des australischen 

 Grebietes," Zoologische Jahrblicher (Spengel), Band ii. Seite 787 (1887). 



The sponge consists of an erect, longitudinally folded lamella, \\'hich attains 

 a height of 300 millim., a breadth of 150 millim., and a thickness of 3 millim. 

 The sJceleton-net is composed of fibres which consist of abundant spicules, 

 and only a small quantity of spongin. The fibres measure 0-033 millim. in 

 thickness and the meshes are 0-13 millim. wide. Sj)iciiles : curved styli, 0-3 

 millim. long and 0-016 millim. thick. 



G-EOGBAPHiOAL DiSTEiBUTioisr. — East coast of Australia (Ramsay). 



Antherochalina dura, Lendenfeld. 



Antherochalina dura, R. v. Lendenfeld, " Die Chalineen des australischen Ge- 

 bietes," Zoologische Jahrbiicher (Spengel), Band ii. Seite 788 (1887). 



Elabelliform pedunculate sponges, 170 milhm. broad and 7 millim. thick. 

 SJceleton-net with meshes 0-13 millim. wide and fibres 0-026 millim. thick. 

 Sjpicides : styli, 0-2 millim. long and 0-02 millim. thick. 



Geographical Distribution. — East coast of Australia : Port Jackson, 

 N. S. W. (Lendenfeld). 



Genus PLACOCHALINA. 



Large, pedunculate, more or less cup-shaped, frondose Placo- 

 chalininse, with a very uneven outer surface, which is covered 

 with ridges. Inner surface smooth. No apparent oscula. Fibres 

 of the skeleton-net stout. 



Placochalina pedunculata, Lendenfeld. 



Plakochalina pedunculata, E. v. Lendenfeld, " Die Chalineen des australischen 

 Gebietes," Zoologische Jahrbiicher (Spengel), Band ii. Seite 791 (1887). 



