88 CHALINJSSA. CEKAOCHALINA. 



thickness. The oscula, which are 2-5 millim. wide, are scattered over the 

 surface of the sponge. Sl-eleton-net with meshes 0-26-0-033 millim. wide and 

 fibres 0-053 millim. thick. Sincides : oxea, straight or slightly curved, 0-053-0-07 

 millim. long and 0-005-0-007 millim. thick ; abundant in the fibres and also 

 scattered in the soft parts of the sponge. 



Chalinissa communis, var. flabellum, Lendenfeld. 



Chalinissa communis, var. Jiahellum, E. v. Lendenfeld, " Die Chalineen des 

 australischen Grebietes," Zoologische Jahrbiicber (Spengelj, Band ii. Seite 



772 (18S7). 



Sponge with lamellar branches. The meshes of the skeleton-net measure 

 0*26 millim. in width, the fibres 0-053 millim. in thickness. Spicules: oxea, 

 0-053 millim. long and 0-007 millim. thick. 



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



N.S.W. {Lendenfeld). 



Genus PACHYCHALINA. 



Irregular, digitate, lobose Pachychalininse, with conspicuous and 

 numerous projecting oscula and abundant very stout spicules. 



Pachychalina manus, Lendenfeld. 



Pacliyclialina manus, E. v. Lendenfeld, " Die Chalineen des australischen Ge- 

 bietes," Zoologische Jahrbiicher (Spengel), Band ii. Seite 777 (1887). 



Hand-shaped sponges, with few short, erect branches, which lie in one plane, 

 attaining a length of 200 millim. The digitate processes and the lamellar 

 central part are 15 millim. thick. The surface is reticulate. SJceldon-net with 

 meshes 0-26 millim. wide, and fibres 0-08 millim. thick. Sjjicules : oxea, 

 strongly curved, 0*059 millim. long and 0-005 millim. thick. 



Geogeaphical Distkibution. — East coast of Australia : Port Jackson, 

 'N.S.W. (Lendenfeld). 



Genus CERAOCHALINA. 



Digitate, lobose Pachychalininae, with well-developed surface- 

 skeleton, thick fibres and small spicides, not exceeding 0*2 milhm. 

 in length. The spicules are not numerous, and confined more 

 or less to Ihc axes of the thicker main fibres. 



