238 Proceedings of the Royal Society of Victoria. 



Acanthella tenuispiculata, n. sp. 



Compressed, flabellate, only about one-third of an inch thick ; 

 may be proliferous. Surfaces glabrous, closely beset with small 

 conuli which are sometimes joined in short ridges ; may be 

 minutely porous between. Vents in one specimen not seen, in 

 the other small but prominent, scattered on both surfaces, each 

 on a small low eminence. Texture tough, compact, leathery, with 

 strong skeletal condensation in the median plane. Pale yellowish 

 pink or nearly white in spirit. 



Skeleton without any visible spongin, composed of long slender 

 spicules densely packed together in the median plane and 

 extending obliquely outwards and upwards in thick looser 

 parallel strands into the low conuli. 



Spicules very long and slender styli (sometimes oxeote), gently 

 curved and with irregular points, measuring about - 64 by O008 

 mm.; with occasional very slender sinuous forms. 



R.N. 542 (x, 19 f.; "orange-chrome"); 1188. 



Genus Ciocalypta, Bowerbank. 



Sponge with large subdermal cavities roofed over by the 

 dermal membrane, which is provided with a well-developed 

 dermal skeleton and supported on pillars of spiculo-fibre radiating 

 outwards from the denser central portion of the main skeleton. 

 Megascleres stylote or oxeote. No microscleres. 



This genus includes Mr. Carter's Leucopkhvus* 



Ciocalypta penicillus, Bowerbank. 



Ciocalypta penicillus, Bowerbank, Mon. Brit. Spong., vol. i., 

 pi. xxx., figs. 360, 361 ; vol ii., p. 81 ; vol iii., p. 33, pi. xiii., 

 tigs. 2, 3, 4. 



Leucophhvus massalis, Carter, A.M.N.H., November, 1883, p. 

 323, pi. xiv., fig. 15. 



1 Ciocalypta penicillus, var. aciculata, Carter, A.M.N.H., 

 November, 1885, p, 366. 



Leucophhva- massalis, Carter, A.M.N. H., November, 1885, p. 

 366. 



* For characters of Leucophloeus see A.M.N.H., February, 1884, p. 130. 



