172 CLASS III.— ORDER I. 



PINNATED. 



95. Sfongia pennatula. Stem arched and twisted, 

 supporting flat leafy pinnies, which approximate and 

 stand out in a sort of crested tuft; surface incrusted, 

 and very porous. 



Australasian seas. 



ARTICHOKE. 



9(>. Spongia cactiformis. Pediculated and branch- 

 ing; expansions flat, cuneiform, fan-shaped, rounded 

 or truncated at the summits, nearly lobed, prolife- 

 rous, and slightly incrusted ; small dispersed exca- 

 vations on the surface. 



Southern seas. 



CURLED. 



97. Spongia crispata. Foliaceous expansions, 

 proliferous and conchoidal, turned in like the border 

 of an ear ; they are irregular in form, and appear 

 blistered, coalescing in some parts, and unequally 

 punctured ; texture fibrous, and very fine. 



Southern seas. 



BLACK-PLUMED. 



98. Spongia hada. Expansions fibrous, leafy, 

 turned in as if curled, laciniated, enclosed one 

 wi(hin the other, and appearing like a small black 

 plume ; fibres bare, rather stiff", and disposed like a 

 loose net. 



Indian Ocean. 



LAMINATED. 



99. Spongia lamellaris. In tliin parallel laminap. 



