G. SPONGIA. 
1 57 
LANK. 
26. Spongia macida. White, crustaceous, and 
rising in spines. 
Norwegian seas. 
BREAD-LIKE. 
27. Spongia panicea. Shapeless and diffuse masses, 
not more than a finger in thickness ; substance white, 
very finely cellular; surface sleek, and slightly porous. 
European seas. 
PAPILLARY. 
28. Spongia papillaris . Crustaceous; surface co- 
vered with conic protuberances more or less elevated, 
either distinct or coalescent, and in some measure tu- 
bulous ; substance soft and friable by desiccation. 
American seas. 
BURNING. 
29. Spongia mens. Of various shapes, porous, 
somewhat prickly, and downy. 
Western shores of Europe and of North America; 
said also to be found in Africa and India. 
NEEDLE-FORMED. 
30. Spongia acicularis . White and solid, exter- 
nally porous and hard ; internally composed of bun- 
dled and upright fibres, converging towards the 
centre. 
Gulf of Genoa, 
N. B. Not improbably an Alcyonia. 
