464 "THETIS SCIENTIFIC RESULTS. 



The spicular fibres are about 0-1 mm. in diameter and from 

 0"1 to 0"2mm. or more apart. The mesh of the network is 

 generally oblong, but very indistinct. 



Megascleres: — oxeaof two sizes — (1)0"4 to 0'5mm. byO-Olmm., 

 (2) 0-1 by 0-004 mm. Both forms are straight and abruptly 

 sharp pointed. 



Microscleres : — fine trichodragmata about 0-15 to 0-2 mm. in 

 length ; they are chiefly arranged in bundles. 



Subfamily GELLIODIN^. 



GELLIODES, Ridley. 



GELLIODES POCULUM, Ridley and Bendy. 



Gelliodes pocidum, Ridley and Dendy, Chall. Rep., ZooL, xx., 

 1887, p. 48, pi. X.; Lendenfeld, Austr. Mus. Cat. xiii., 

 Sponges, 1888, p. 189. 



Station 44. 



A single example of this species was obtained off Coogee, at a 

 depth of 49-50 fathoms. 



CHONDROPSIS, Carter. 



CHONDROPSIS SYRINGIANUS, sp. nov. 



(Plate xliii., fig. 1.) 



Station 53. 



Sponge consisting of a short thick peduncle and a series of 

 tubular branches from 50 to 250 mm. in length and from 10 to 

 40 mm. in diameter, total height nearly 300 mm., larger diameter 

 190 mm., smaller about 100 mm. Externally the surface is 

 somewhat uneven, the branches exhibit from four to six rounded 

 nodes and a few low blunt elevations. Internally the tubes are 

 lined with numerous oscula from 2 to 3 mm. in diameter. The 

 tubes commence immediately above the peduncle and gradually 

 increase in diameter to within a short distance of the somewhat 

 contracted summits ; the latter are bordered by a delicate mem- 

 braneous margin which in the living sponge was probably highly 

 contractile ; their diameter is usually about 25 mm. General 

 surface closely reticulate, finely porous, and minutely conulose. 

 The mesh of the dermis varies from 0*5 to 1 mm. in diameter, and 

 the fibres of the network are rather coarse and plainly visible to 

 the unaided eye. 



