588 DR. R. VON LENDENFELD ON THE SYSTEMATIC [DeC. 21, 



Schulze ; Coscinoderma, Carter ; Spongodendron, Lendenfeld ; and 

 many of the species of the genus Spongia, auctorum. 



4. Subfamilia Spongissince^ Lendenfeld. 



With flesh -spicules. 

 Spongissa, Lendenfeld, MS. 



2. Familia Aplysinid^, Lendenfeld. 



The skeleton is composed of spongin-tubes, the walls of which are 

 thinner than the diameter of the lumen, which is filled with pith. 



I . Subfamilia Aplysinince. 



Without flesh-spicules. 



Luffaria, Duchassaing and Michelotti ; Aplysina, Nardo ; Luffa- 

 rella, Lendenfeld, MS. ; Dendrospongia, Hyatt. 



2. Subfamilia AplysissincB, Lendenfeld. 



With flesh-spicules. 

 Aplysissa, Lendenfeld, MS. 



3. Familia Hircinid^, Lendenfeld. 



With narrow axial canal in the fibres, and filaments in the ground- 

 substance. 



1 . Subfamilia HircinincB, Lendenfeld. 



Without proper spicules. 



Hircinia, Nardo ; Rircinopsis, Nodosina, Aphrotriche, and Sty- 

 phlos, Lendenfeld, }.1S. ; Stematonemia, Bowerbauk ; Filifera, Lie- 

 berkiihn ; Sarcatragus, Schmidt ; and Polytherses, Duchassaing and 

 Michelotti. 



2. Subfamilia Hircinissincs, Lendenfeld. 

 With proper spicules. 



1. Group Chalinocinia, nov. 



With proper spicules in the conuecting fibres. 

 Chalinocinia, Lendenfeld. 



2. Group Hircinissa, nov. 



Without proper spicules in the fibres ; with flesh-spicules. 

 Hircinissa, Lendenfeld, MS. 



ii. Tribus Macrocamera, Lendenfeld. 



With large sac-shaped ciliated chambers, and soft, transparent 

 ground-substance. 



4. Familia Spongelid^, Lendenfeld. 



The horny fibres contain slender axial thread and form a 

 reticulated skeleton. 



