G. ALCYONItJM. 243 



tremities of the branches obtuse ; cells placed on large 

 tubercles. 



Sea of Norway, Mediterranean, and Indian Ocean. 



Nota, Most authors have mentioned this Polypi- 

 dom as originating on the coasts of Norway ; Koel- 

 reuter found it in the Mediterranean, and Pallas says 

 he has seen them in the Indian Ocean ; but the differ- 

 ence in the temperature of these seas is such as to 

 incline me to think the authors here mentioned may 

 have mistaken the identity of the species, and that pro- 

 bably the A. Arboreum of the north may differ from that 

 of the Mediterranean, or that of the Indian seas ; al- 

 though, as the temperature is more nearly alike in the 

 last-mentioned seas, there may be a stronger resem- 

 blance in their Polypidoras. 



PALMATED. 



2. Alcyonium palmatum. Stem flattened, and 

 reddish; terminated above by lobes resembling fin- 

 gers, and strewn with starry pores. 



Mediterranean. 



LOBED. 



3. , Alcyonium lobatum, A tube-formed mass, 

 drawn in at the base, and terminated by finger-shaped 

 lobes, whose number varies. — Plate 13. 



European Ocean. 



Nota, The colour of this Polypidom varies from 

 a white, lightly tinged with rose, to the deepest orange, 

 beautifully contrasted by the white polypus, whose 

 colour never changes. 



RED. 



4. Alcyonium rubrum. Thin patches of a red 

 colour,, wholly covered with dispersed points or cells 

 with eight rays. 



Sea of Norway. 



