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 asbestinum. Stem nearly cylindri- 
cal, and reddish, strewn with oblong pores, disposed 
in fives. 
American seas. 
SKULL-FORMED. 
28. Alcyonium cranium . 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 
