88 BRITISH SPONGIAD^. 



the striking peculiarities of the dermal system renders 

 it readily distinguisliable from any otter known 

 Britisli species of Hymeniacidon." 



36. HrMBNiAOiDON PLUMiGEE, Bow, III, 191 ; PL 

 LXXII, figs. 10—12. 



37. Hymeniacidon suberetjs (Montagu), ii, 200; iii, 

 PI. XXXVI, figs. 1—4. 



1861 Hcdina suherea, Bowerbank. List Brit. Marine Invert. 



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



1862 Suheritea domuncula, Schmidt. Spong. Adriat. MeereSj 



p. 67. 

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

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



p. 76. 



38. Hymeniacidon caenosus (Johnston), ii, 203 ; iii, 

 PL XXXVI, figs. 5-9. 



1861 Halina carnosa, Bowerbank. List Brit. Mai-ine Invert. 



Fauna (Brit Assoc), p. 70. 

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

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



Habitat. — Birterbuy Bay, abundant on shells of 

 Peden maximus, Turritella terebra, Lutraria oblonga, 

 and other species (N.). 



39. Hymeniacidon gelatinosus, Bow., ii, 222; iii, PL 

 XXXVIII, figs. 7, 8. 



1867 Suberites gelatinosa. Gray. Proc. Zool. Soc, p. 623. 



Habitat. — The locality of the type-specimen is 



