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. 



4G. 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 ^\e centimetres. 



European Ocean. 



