G. ALCYONIUM. 245 



bands or fillets, which climb or twine on the Spongia 

 Deltoidea and Loricaris ; warty protuberances, ri- 

 sing very little, pierced at the centre by an oscule 

 frequently plaited in rays. 

 Seas of America. 



TRIAXGULAR. 



11. Alcyonium trigonum, A fleshy mass, rather 

 thick, compact in a dry state, trigonal, whitish, and 

 porous both on the inside and outside. 



PERFORATED. 



12. XhCYO'^iiSM foratum. Oblong, and nearly cy- 

 lindrical ; surface almost reticulated ; oscules large, 

 and dispersed; substance spongy, firm, and not 

 flexible. 



SIEVE-LIKE. 



13. Alcyonium cribrarium. In large envelopes, 

 whitish, and bored with non-projecting oscules, which 

 are terminated by tubulous cells. 



PHALLIC. 



14. Alcyonium phalloides. Pedicle short and 

 thick, supporting wide branches, which are tortucms, 

 lobed, and collected in dense packets ; oscules small, 

 and dispersed. 



Oriental seas. 



PYRAMIDAL. 



15. Alcyonium pyramidale. Of a conical or cy« 

 lindrical form ; interior substance fleshy and red. 



Mediterranean. 



