576 



Transactions. 



Size of spicules : Oxea.. 0-1 mm. by 0-005 mm. ; styli, 0-84 mm. by 

 14 mm. 



Two specimens were received, dry and somewhat broken. The label 

 reads, " Taken in rock-pools, Meyer Island (near Sunday Island) ; 29/2/08," 





Fig. 2. 



A ^ 



fssmMk 



Fig. 3. 



Fig. 2. — Reniera reversa. 

 1. Section of skeleton at right angles to surface. 2, 3. Styli. 4. Oxea. 



Fig. 3. — Chalina fistulosa. 



1. Portion of dermal skeleton. 2. Section of skeleton at right angles 

 to surface. 3. Oxea. 



Genus Chalina Grant. 



Chalininae whose skeletal reticulation is typically rectangular. Fibres 

 usually slender, with much spongin, and few, but usually well-developed, 

 spicules. 



Chalina fistulosa n. sp. Fig. 3. 



Sponge massive, sessile ; with well-developed oscula, oval or rounded, 

 which terminate short fistular processes on the upper surface of the sponge. 

 Fistulae from 5 mm. to 12 mm. in height ; oscula from 5mm. to 8mm. in dia- 

 meter. Surface smooth. Colourof dry specimen dirty-yellow. Texture harsh. 



Internal skeleton showing approximately rectangular meshes. Longi- 

 tudinal fibres usually a little stronger than the transverse ones, and loosely 

 cored with a strand of spicules often arranged with some irregularity. In 

 the transverse fibres the spicules are few, never forming a connected strand 

 and never polyserial. 



Dermal skeleton shows fibres that are about the same diameter as the 

 primary fibres of the internal skeleton, but dark in colour. They form a 



