248 CLASS IV. 



pressed, frequently cylindrical, obtuse at the summit, 

 and osculated ; oscules dispersed, or in marginal se- 

 ries ; height twenty-nine or thirty centimetres. 

 Coast of Madagascar. 



'Nota. Some doubts exist whether this may not be a 

 Spongia. 



OAK-LEAVED. 



26. Alcyonium quercinum. Stem short, stiff, 

 firm, full, and rather tortuous, ramified, dilating in flat 

 expansions, foliaceous, incised, laciniated, slightly 

 lobed, having some resemblance to the leaves of 

 the oak, and sometimes enveloping fuci ; height fif- 

 teen centimetres. 



Australasia. 



ASBESTINE. 



27. Alcyonium ashestinum. Stem nearly cylindri- 

 cal, and reddish, strewn with oblong pores, disposed 

 in fives. 



American seas. 



SKULL-FORMED. 



28. Alcyonium cranimn. Tubulous, white, and 

 covered with hairs. 



Sea of Norway. 



papilliferous. 



29. Alcyonium papilliferum. Sessile and spread 

 out; surface covered with short smooth papillae, 

 more or less projecting, and osculated; the space 

 between the papillae reticulated, and stuck with 

 small thorn like tubercles ; colour reddish fawn 



