BY E. F. HALLMANN. 503 



B. microxa Hentschel(l4). Sharks Bay, W. Australia. 



B. sp. Hentschel(15). Arafura Sea. 



B. chilensis Thiele(42). (With Chili. 



spherulse). 



B. megalosigma Hentschel(15). Arafura Sea. 



(With spherulse). 



B. megalosigma var. liposphcera Arafura Sea. 



Hentschel(l5). 

 B (AUantophora) ciocalyptoides Port Phillip, Victoria. 



Dendy. 



iv. With inicrostrongyla. 



B. {AUantophora) plicata White- New South Wales. 



legge. 

 B. {AUantophora) victoriana, sp.n. Port Phillip, Victoria. 

 B. {'^;AUantopho7-a) raicrostrongyla Arafura Sea. 



Hentschel(15). 



Allantophoka plicata Whitelegge. 

 (PI. xxix., fig.4; PI. XXX., iigs.l, 2, 3.) 



I'^Q'l .AUantophora plicata Whitelegge(60),p.505,Pl.xlv., fig.28. 



Diagnosis. — Sponge consisting of a cluster of erect, proliferous 

 lamellae, sometimes interunited more or less by anastomosis, and 

 frequently tending to become more or less pointed above or to 

 divide distally into digitate processes. Surface irregular, and 

 provided with many slender tapering conuli. Dermal membrane 

 moderately thick, without contained megascleres, and without 

 pores visible to the naked eye. Skeleton an irregular reticula- 

 tion, of fairly uniform density throughout, consisting of ascend- 

 ing multispicular main fibres (mostly between 100 and 200/a in 

 stoutness) and numerous slendei'er, for the most part pauci- 

 spicular, connecting fibres. Spicules of the main fibres rather 

 loosely (and often somewhat plumosely) arranged. Both main 

 and connecting fibres provided with moderately numerous, more 

 or less nearly perpendicularly-directed, echinating spicules 

 similar in kind to the coring spicules. Spongin present only in 

 moderate quantity. Megascleres: styli and (relatively few) oxea, 



