PLACOCHALINA, 



91 



Large irregular, frondose or infundibuliform, pedunculate sponges, which 

 attain a height of 180-250 miUim., a breadth of 150-300 miUirn., and a thick- 

 ness of 8-9 millim. Surface uneven. Sponges hard and inelastic. Skeleton- 

 net with meshes 0-2-0-4 millim. wide, and fibres 0-003-046 miUim. thick. 

 Spicules: oxea, 0-05-0-067 millim. long, 0-003-0-004 millim. thick. 



Placochalina pedunculata, var. dura. Carter. 

 Plakochalina pedunculata, var. dura, K. v. Lendenfeld, " Die Chalineen des aus- 



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

 CavocJialina bilamellata, H. J. Carter, "Descriptions of Sponges from the 

 neio-hbourhood of Port Phillip Heads, South Australia," Annals and Maga- 

 zine of Natural History, ser. 5, vol. xvi. p. 287 (1885). 

 Frondose sponges with an inflated peduncle attaining a height of 180 

 millim., a width of 150 millim., and a thickness of 9 millim. Surface smooth 

 on one side ; the opposite face is covered with a reticulation of projecting 

 ridges. Skeleton-net with meshes 0-4 millim. wide and fibres 0-033 millim. thick. 

 S2)icules : oxea, 0-053 millim. long and 0-003 millim. thick. 



GEOGEAPHiCAii DiSTEiBTJTioN. — East coast of Australia : Port Jackson, 

 N. S.W. (Ramsay). 



Placochalina pedunculata, var. pocula, Lendenfeld. 

 Plakochalina pedunculata, var. pocida, E. v. Lendenfeld, " Die Chalineen des 

 australischen Gebietes," Zoologische Jahrbucher (Spengel), Band ii. Seite 

 792 (1887). 

 Elegantly cup-shaped, pedunculate sponges, with apparent zones of growth, 

 attaining a height of 250 millim., a breadth of 300 milUm., and a thickness 

 of 8 millim. Surface as in the foregoing variety. Skeleton-net with meshes 

 0-3 millim. wide and fibres 0-046 milhm. thick. Spicides : oxea, 0-053 millim. 

 long and 0-003 milhm. thick. 



Geographical Disteibution. — North and East coasts of AustraUa : Port 

 Jackson, N. S.W. (Lendenfeld); Illawarra, N. S.W. (Ramsay); Torres Straits 

 (Macleay). 



Placochalina pedunculata, var. mollis, Lendenfeld. 



Plakochalina pedunculata, var. mollis, E. v. Lendenfeld, " Die Chalineen des 



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



792 (1887). 



A lamella which is about 110 millim. high, 320 milUm. broad, 10-12 



millim. thick, and depressed in the centre. The surface is slightly undulating 



on the upper side, and covered with irregular rounded ridges on the lower. 



