Ao THE DEPTHS OF THE SEA. [CHAP. IX. 
Lophohelia prolifera, Pautas (Fig. 30, p. 169). 
—Many varieties; abundant at depths from 150 
to 500 fathoms all along the west coasts of Scot- 
land and Ireland, at temperatures varying from 
0° to 10° C. In some places,—as, for example, at 
Station 54, between Scotland and Féroe, and Station 
15, between the west coast of Ireland and the 
Porcupine Bank,—there seem to be regular banks 
of it, the dredge coming up loaded with fragments, 
living and dead. 
Five allied species of the genus Amphihelia oc- 
curred more sparingly. 
Fic. 68.—Flabellum distinctum. Twice the natural size. (No. 28, 1870 ) 
Allopora oculina, EHRENBERG, a very beautiful 
form, of which a few specimens were procured in the 
‘cold area,’ at depths a little over 300 fathoms. 
Thecopsammia socialis, PoURTALES (Fig. 69), a form 
closely allied to Balanophyllia, and resembling some 
crag species. It had been previously dredged by 
Count Pourtales in the Gulf of Florida. Theco- 
psammia is tolerably common in deep water in the 
‘cold area,’ growing in patches, five or six examples 
sometimes coming up on one stone. 
