Sponges from South Australia. 363 



lations. Pores and vents not seen. Spicules of one form 

 only, viz. acuate, about 100 by 3-6000ths, situated in the 

 interior of and projecting, through the fibre. Structure 

 columnar, composed of erect plumoselj-tufted filaments in 

 juxtaposition, ending in .the granulations of the surface. Size 

 of specimen ^ in. high b j 2 x 2 in. horizontally. 

 Depth 11 fath. 



Group 7 h. Phakellina. 

 28. Phahellia flahellata. 



Substipitate, contracted towards the base, expanding into a 

 flabellate form with irregularly undulating round border. 

 Consistence resilient. Colour when fresh " yellow-buff," much 

 the same now. Surface undulating^ uniformly granulated. 

 Pores and vents not conspicuous. Spicules of two forms, 

 viz. one acuate, the other acerate, both about the same size, 

 viz. 40 by l|-6000ths, chiefly confined to the fibre, which, 

 ending on the surface in spiculiferous tufts, produces the 

 granulated character. Structure compact, hardening towards 

 the central plane, from which the fibre curves upwards and 

 outwards to the surface on each side. Size of specimen 2 in 

 high by 4 X g- in. horizontally. 



Depth 20 fath. 



29. Phahellia crassa. 



Stipitate, flabellate, winged proliferously, thickish ; margin 

 round, irregularly undulating. Consistence firm, resilient. 

 Colour when fresh " wax-yellow," now yellowish brown. 

 Surface uniformly covered with papillary elevations about 

 4-12ths inch apart^ supporting a granulated dermis. Vents 

 small, stelliform, on the summits of the papillary elevations. 

 Spicules of one form only, viz. acuate, small, stout, about 

 60 by 2|-6000ths. Structure plumose, fibre curving up- 

 wards and outwards from the central plane, where it is 

 condensed, to the surface on each side, where it is loose, and 

 ends in tufts of spicules which form the granules. Size of 

 specimen 6 in. high by b in. horizontally; lamina 5-12ths in. 

 thick. 



Depth 20 fath. 



30. Phahellia hrassicata. 



Stipitate, vase-like rosette head, dividing at once from a 

 longish stem into several short, somewhat compressed flabellate 

 branches, which expand into still more compressed, thin, leaf- 

 like divisions, about 1 -8th in. thick ; alate, proliferous, and 



