88 BRITISH SPONGIAD^. 



the striking peculiarities of the dermal system renders 

 it readily distinguishable from any other known 

 British species of Hymeniacidon." 



36. HYMENIACIDON PLUMIGER, Bow, in, 191 ; PL 

 LXXII, figs. 1012. 



37. HYMENIACIDON SUBEBEUS (Montagu), u, 200; in, 

 PL XXXVI, figs. 14. 



1861 Halina suberea, Bowerbank. List Brit. Marine Invert. 



Fauna (Brit. Assoc.), p. 70. 



1862 Suberites domuncula, Schmidt. Spong. Adriat. Meeres, 



p. 67. 



1867 Suberites suberea, Gray. Proc. Zool. Soc., p. 523. 

 1870 Suberites dcmuncula, Schmidt. Spong. Atlant. Geb., 



p. 76. 



38. HYMENIACIDON CAENOSUS (Johnston), u, 203 ; in, 

 PL XXXVI, figs. 59. 



1861 Halina carnosa, Bowerbank. List Brit. Marine Invert. 



Fauna (Brit Assoc.), p. 70. 



1867 Siiberiies carnosa, Gray. Proc. Zool. Soc., p. 523. 

 1870 Suberites carnosa, Schmidt. Spong. Atlant. Geb., p. 76. 



Habitat. Birterbuy Bay, abundant on shells of 

 Pecten maximus, Timitella terelra, Lutraria ollonga, 

 and other species (N.). 



39. HYMENIACIDON GELATINOSUS, Bow., u, 222; in, PL 

 XXXVIII, figs. 7, 8. 



1867 Suberites gelatinosa, Gray. Proc. Zool. Soc., p. 523. 



Habitat. The locality of the type-specimen is 



