Synopsis of the Australian Calcarea Heievocada. 87 



SLirfoce is very smooth. The anatc^uiy is very typical. The 

 radial chambers are straight, cylindrical and only slightly 

 branched, and extend from gastral to deimal coitex. The 

 inhalnnt pores are irregularly scattered through the dermal 

 cortex, which is well developed and about 007 mm. thick. 

 The gastral cortex is of about the same thickness and is 

 perforated by the short, wide exhalant canals, one coming 

 from each chamber and separated from it by a constricted 

 diaphragm. 



The skeleton is arranged in typical manner, the spicnlation 

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

 angle a little wider than the laterals ; facial rays straight, 

 conical, graduall}' sharp-pointed; basal ray about 0-5 by O'Ol 

 mm. ; oral rays 012 by 001 mm. ; apical ray short, fairly 

 stout, only moderately sharply-pointed, slightly curved, 

 about 0-06 mm. long. (2) Gastral triradiates ; similar to the 

 foregoing, luit with no apical ray. (3) Subgastral sagittal 

 trii-adiates ; stronyly developed, with widely extended, 

 slightly recurved, gradually sharp-pointed oral rays and very 

 long, straight basal ray gradually tapering to a sharp point; 

 oral rays about Oi5 by 0-014 mm. ; basal ray about 0-35 by 

 0-0 1 4" mm. (4) Tubar triradiates ; somewhat smaller than the 

 foregoing but well developed, with straight or nearly straight 

 rays, gradually sharp-pointed, the basal considerably longer 

 than the other two. (5) Dermal tri'-adiates ; sagittal, very 

 similar to the tubar tru-adiates but perhaps a little longer 

 and placed horizontally in the dermal cortex. (6) Oxea of 

 the dermal cortex ; very small, straight, graduall^y sharp- 

 pointed at the inner end and beautitully hastate or lance- 

 pointed at the outer ; about 0-04.3 by O'OOS mm. ; arranged 

 at right angles to the dermal surface. Occasionally a large 

 oxeote s[)icule is found around the margin of the osculum, 

 but these are extremely rare. 



Mr. Carter's specimen, described from Mr. Wilson's collec- 

 tion, was " agglomerated." I have little doubt as to the 

 specific identity of the two, but there are sufficient points of 

 distinction between my specimen and Mr. Carter's original 

 description to render a fresh description desij-able. 



Locality. — Near Ft. Phillip Heads (Carter; and Station 9, 

 coll. J. B. Wilson). 



1 8. Granfia gracilis, von Lendenfeld, sp. 

 Vosniaeria gracilis, von Lendenfeld. Proceedings of the 

 Linnean Society of New South Wales, Vol. IX, ]>. 1111. 



