SS2 Messrs. S. O. Ridley and A. Dendy on 



Family 2. Heterorrhapliidse *. 



Spicules of various forms ; flesh-spicules commonly present, 

 but never anchorates. 



Subfamily i. Pelceobictyina (Carter). 



Sponge divisible into body and fistulae ; with a strong 

 spicular rind. Skeleton-spicules acerate to cylindrical. 



Genus Rhizochalina (Sclimidt). 

 Flesh-spicules absent. 



Bhizochalina putridosa (Lamarck ?). 



Large, massive, subspherical. Upper surface bearing 

 numerous short closed fistula directed upwards. Pale yellow. 

 Texture dense. Surface uneven. Skeleton arranged as in 

 R. Jistidosa, Bk. Spicules slightly curved, abruptly but fairly 

 sharply pointed acerates ; size '195 by '013 millim. 



Localities. Station 162, Bass Straits, 38 fath. ; off Port 

 Jackson, 30-35 fath. ; off Bahia (?). 



Rhizochalina pedunculata^ n. sp. 



Koundedly elongate, narrowing below into a short stout 

 peduncle ; height 1| inch, breadth 1 inch. Fistulce very 

 short (? all broken off). Brownish yellow. Rind very thin, 

 like paper. Surface rugose. Texture compact. Skeleton 

 arranged much as usual ; bast-layer very thin, with fibres 

 compact. Spicules slightly curved acerates, sometimes 

 blunted, measuring up to about '25 by "009 millim. ; also in 

 the dermal reticulation occasional cylindricals, size variable. 



Locality. Api, New Hebrides, 60-70 fath. 



Genus Ocean Apia (Norman). 

 Bihamate flesh-spicules present. 



\_Oceanapia rolustay Bk. 

 Locality. Bahia (?).] 



Subfamily ii. Gelliina. 



Skeleton-spicules acerate. Flesh-spicules present, viz. 

 feihamates or tricurvates. No rind or fistulse. 



* tTfpos, different ; pa({)\s, needle. 



