246 Proceedings of the Royal Society of Victoria. 



Hymeniacidon carnosa, Bowerbank, Mon. Brit. Spong., vol. ii., 

 p. 203, vol. iii., pi. xxxvi., figs. 5-9. 



Suberites carnosus, Ridley, Zool. Coll. H.M.S. "Alert," p. 465. 



Suberites globosa, Carter, A.M.N.H., February 1886, p. 116. 



Suberites (Hymeniacidon) carnosus, Carter, A.M.N.H., Decem- 

 ber, 1886, p. 456. 



Suberites carnosus, Ridley and Dendy, Challenger Monaxonida, 

 p. 197. 



This species is easily recognised by its globular to fig-shaped 

 external form, compact structure and long, slender, pin-headed 

 spicules (tylostyli) arranged confusedly in the interior and in 

 radiating brushes at the surface. The spicules in my specimens 

 measure about 029 by O004 mm., which is rather smaller than 

 Bowerbank gives for the British form. My Victorian specimens 

 are also characterised by conspicuous, usually large vents, while 

 in the British form the vents are inconspicuous, but this 

 difference can scarcely be specific. 



R.N. 294 (20 f.; "brownish-yellow"); 427 (x, 19 f . ; "Cinna- 

 mon"); 1010 (x B); 1034 (x B); 1090 (x A). 



B.M. sp. 15 ("Suberites globosa, Carter?" Reg. 86-12-15-106); 

 d. 119 (" Suberites carnosa," Reg. 86-12-15-386). 



Suberites flabellatus, Cartel'. 



Suberites flabellatus, Carter, A.M.N.H., February, 1886, p. 117. 



1 Suberites globosa (elongated form), Carter, A.M.N.H., Febru- 

 ary, 1886, p. 116. 



This species is very common in Port Phillip and may be easily 

 l'ecognised by its compressed, lobose, digitate or branching form, 

 its orange or yellow colour in life, fading in spirit, and its typical 

 pin-headed spicules considerably larger than those of .S. carnosus. 



R.N. 296 (20 f.; "wax-yellow"); 378 (18 f.; " dark orange"); 

 488 (s. 10, 8 f.; "orange-ochraceous"); 623 (x, 19 f.; "orange"); 

 799 (s. 10); 809 (s. 5); 893 (s. 10); 988 (s. 9); 1012 (x B). 



B.M. d. 115 (" Suberites flabellata," Reg. 86-12-15-384); d. 116 

 ("Suberites globosa (branching form)," Reg. 86-12-15-378). 



Suberites insignis, Carter. 



Suberites insignis, Carter, A.M.N.H., February, 1886, p. 118. 

 This species is distinguished by its massive form, with wide 



