92 PLACOCHALINA. — PHTLOSIPHONIA. 



STceleton-xiet with meshes 0*2 millim. wide and fibres 0*04 milliin. thick. 

 Spicules : oxea, 0-067 millim. long and 0*005 millim. thick. 



Geographical Disteibtjtion. — South coast of Australia : St. Vincent's 

 Gulf, S. A. {HaacTce). 



Group SIPHONIN.S:. 



Wide, tubular or cup- shaped, hollow, lacunose ChalininaD, with 

 slender spicules. 



Genus PHYLOSIPHONIA. 



(= Siphonochalina, O. Schmidt, partim.) 



Smooth, annulated, tubular Siphoninie, with terminal prseoscula. 

 Skeleton with abundant and large spicules. 



Phylosiphonia superba, Lendenfeld. 



PJiylosiplionia superha, E. v. Lendenfeld, " Die Chaliueen des australischen 

 Gebietes," Zoologische Jahrbiicher (Spengel), Band ii. Seite 798 (1887). 



The sponge consists of a number of erect tubes, which grow out from a 

 repent basal mass ; it attains a height of 210 milHm. ; the tubes, which have a 

 circular transverse section, are on an average 15 millim. wide. The terminally- 

 situated prseoscula measure from 8-10 millim. in diameter. Surface smooth, 

 undulating. Sponge pretty hard and elastic. The colour of the living sponge 

 is light violet. 



Slceleton-nQt with meshes 0-3 millim. wide and fibres 0-08 millim. thick. 

 Spicules. Megasclera: oxea, confined to the main fibres, measuring 0-09 millim. 

 in length and 0-002 millim. in thickness. Spicules scattered in the ground- 

 substance, of two kinds : — (1) Oxea similar to those in the main fibres, and (2) 

 Toxea, which measure 0-03 millim. in length and 0-0007 millim. in thickness. 



Geographical Distributio'.— East coast of Australia : Port Jackson, 

 N. S. W. (Lendenfeld). 



Phylosiphonia spiculifera, Lendenfeld. 



P7iylosij)7ionia spiculifera, R. v. Lendenfeld, " Die Chalineen des australischen 

 Gebietes," Zoologische Jahrbiicher (Spengel), Band ii. Seite 799 (1887). 



The sponge consists of erect anastomosing branches, which form a reticulation. 

 It attains a height of 250 milhm. and a breadth of 150 millim. The digitate 



