216 HISTORY OF BRITISH ZOOPHYTES. 
placed in a vessel of sea-water, the polypes protrude them- 
selves amazingly, and extend their tentacula, which are 
thick, obtuse, grooved along the centre, and not longer than 
the diameter of the disc.” 
2. ALCYONIUM GLOMERATUM. 
Hab. Dublin Bay, Hassall ; Cornwall, Couch. 
Though, generally speaking, this Aleyoniwm is rare, it 
seems not to be uncommon in Cornwall, so that it is fami- 
liar to Mr. Couch. A fine live specimen of it was brought 
to us by a fisherman, who had obtained it in his net off 
Saltcoats, and we have seen another live specimen in the 
possession of Major Martin, dredged at Cumbraes, and kept 
for weeks alive in sea-water in a glass vessel. It differs 
from the preceding one strikingly in colour, which is bright 
red. 
Genus XXII. SARCODICTYON, £. Yorbes. 
Gen. Char. Polypidom incrusting, linear, creeping, anastomos- 
ing at intervals, so as to form a sort of network. Polypes dis- 
tant, in uniserial prominent cells; the tentacula eight, and pin- 
nated.—Johnston. 
1. SARCODICTYON CATENATA. 
Hab. Youghall, R. Ball; Lochfine, and in several loca- 
