82 Proceedings of tJte Ro/jal Sucieiy of Victoria. 



10. Sy con .suhkispidum, Cavtev, s[). 



Grantia siibldnpida, Carter. Annals and Magazine of 

 National History, July 1886, p. 36. 



This species, described by Mr. Carter from Mr. Wilson's 

 collection, evidently belongs to the genus Sycon, but I have 

 not been able to identify any of my specimens therewith. 



Locality. — Near Port Phillip Heads (Carter). 



1 1 . Sycon rcmisayi, von Lendenfeld, sp. 



Sycandra ramsayi, von Lendenfeld. Proc. Linn. Soc, 

 N.S.W., Vol. IX, p. 1097. 



I have only seen specimens of this species from Port 

 Jackson. Mr. Carter, however, records it amongst Mr. 

 Wilson's sponges from Port Phillip. The gastral cavity 

 is, according to my experience, widely dilated, and not 

 comparatively small, as stated in the original desci-iption. 



Localities. — Port Jackson (von Lendenfeld, &c.) ; near 

 Port Phillip Heads (Carter). 



12. Sycon boomerang,'^ n. sp. 



Solitary, stipitate ; of slightl}^ compressed, ovoid shape, 

 tapering gradually below to form the narrow stalk, which is 

 about equal in length to the main body of the sponge ; with 

 a rathei- small, terminal, naked osculum. Total height of 

 the specimen about 37 mm., greatest breadth 12-5 mm. The 

 dermal surface is smooth and even, but with a characteristic 

 porous appearance. The wall of the sponge is very thick 

 and the gastral cavity correspondingly narrow. 



The radial chambers are very long and nari-ow and branch 

 re])eatedly, the branches running parallel and becoming- 

 much narrower as they approach the dermal surface. The 

 itdmlant canals are correspondingly long and narrow, and 

 their outer ends are covered over by a delicate pore-bearing 

 membrane which stretches between the rounded distal 

 ends of the chambers. The gastral cortex is thin. The 

 skeleton is arranged in typical manner, the spiculation 

 being as follows : — (1) Gastral quadriradiates ; sagittal ; 

 with very long, slender, hastate basal ray, measuring 

 about 0'2 X 0007 mm., sometimes longer ; paired rays 

 about one-third to one-half the length of the basal ray 

 and somewhat stouter, straight, conical, gradually sharp- 



* So called from the shape of the apical raj's of the gastral quadriradiates. 



