252 
CLASS IV. 
ing of tufts, osculated on their borders ; colour grey- 
ish ; height from twenty to twenty-five centimetres. 
European seas. 
ORBICULAR. 
44. Alcyonium orbiculatum. A thick orbicular 
mass, compressed, very porous both within and with- 
out ; of a firm consistency, and surface rough to the 
touch ; height from eight to nine centimetres. 
RADIATED. 
45. Alcyonium radiatum. An orbicular and ra- 
ther concave mass, sleek, plaited in rays toward the 
borders, having in the middle a projecting disk, com- 
posed of about six conoidical tubercles, that are united 
and cavernose ; lower surface convex ; border gar- 
nished with ribs of unequal length, of a fibrous tex- 
ture, and radiating ; colour yellowish white ; height 
sixty-five millimetres. 
POINTED. 
46. Alcyonium cuspidiferum. Base in the form 
of a thick hollow pedestal, divided above into upright 
lobes, which are very long, crenated, fistular, and 
pointed; of a rather leathery consistence; height 
three decimetres. 
GRANULOUS. 
47. Alcyonium granulosum. Orbicular masses, 
convex above, flattened below, with some irregular 
gaps and furrows ; height from three to five centimetres. 
European Ocean. 
