G. ALCYONIUM. 
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 Polypidoms. 
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. 
