Synopsis of the Australian Galcarea Heterocosla. 81 



Localities. — Near Port Phillip Heads (Stations 1, 8, 14, 

 and outside the Heads, coll. J. B. Wilson) ; King Island 

 (coll. Profe.ssor Si)encer). Ha:jckel also records the species 

 from Bass Straits and the Gulf of St. Vincent. 



8. Sf/con setosum, 0. Schmidt. 



Sycon setosum, 0. Schmidt. Spong. Adriat. Meer., p. 15. 



I identify two specimens in the collection with this 

 species. They differ from the typical 8. rwphanus in the 

 more hairy surface, due to the greatei- length of the dermal 

 oxea, and also in the elongation of the apical rays of the 

 gastral quadriradiates. Probably it is merely a. slight 

 variety of S. raphanus. The species has hitherto only been 

 recorded from the Mediterranean. 



Locality. — Near Port Phillip Heads (Stations (J, 9, coll. 

 J. B. Wilson). 



9. Sycon ensiferum, n. sp. 



Solitary, stipitate, closely resembling S. rapkanus ; with 

 very markedly conulose surface and little or no oscular fringe. 

 The two specimens are rather larger and especially stouter 

 than most Australian specimens of >S'. raphanus which I 

 have seen. 



Canal-system typical ; chambers of good length, termi- 

 nating in low, rounded distal cones. 



Skeleton arranged in typical manner. The species is 

 distinguished by the following characters in its spiculation, 

 which in general characters resembles that of 8. ra/phanus 

 closely : — (1) The apical rays of the gastral quadriradiates 

 are very strongly developed, swelling out into long club- 

 shaped foi-m (sword-shaped in longitudinal section), but 

 fairly sharply pointed and only very slightly curved, very 

 much broader in the distal than in the proximal half. 

 (2) The ordinary tubar radiates very frequently have a 

 small apical lay developed. (8) The basal rays of many of 

 the most distally situated tubar triradiates are very strongly 

 bent outwards from the wall of the chamber, so as to curve 

 over and protect the entrances to the inhalant canals. 

 (4) The oxea at the distal ends of the chambers are of 

 moderate length and thickness, straight or nearly so, 

 symmetrical and fairly gradually sharp-pointed at each end. 



Locality. — Near Port Phillip Heads (Station 9, coll. 

 J. B. Wilson.) 



