178 Zoological Society :— 
would doubtless bring other species to light, and possibly something 
additional would be discovered by an examination of the shore in 
other parts of the island. As to the nomenclature of the genera, | 
have considered it right to follow Mr. Gosse, to whom all students 
of this tribe of Zoophytes must feel much indebted for his pains- 
taking book on the British species. 
A Cornulariais included ; for although not, strictly speaking, a Sea- 
Anemone, it closely resembles one in external appearance. 
Order ALCYONARIA, M.-Edw. 
CoRNULARIA ATLANTICA, Sp. n. 
Basal band narrow, inconspicuous, creeping irregularly, and bear- 
ing the polypes at uncertain distances. Column of a pale flesh- 
colour, subcylindrical, rather wider at. the middle than above and 
below; destitute of spicula, but invested by a thin epidermis con- 
taining particles of sand; when retracted, forming a fleshy hemisphe- 
rical button, one-fifteenth of an inch high ; when expanded, the co- 
lumn has a length of about three-tenths of an inch, with a diameter 
of one-twelfth of an inch. Eight pinnate tentacles, in one series, at 
the margin of the shallow cup forming the disk, the pinne of about 
twelve pairs, ringed, as if showing a tendency to further division. 
Tentacle-stem subulate, about one-fourth of an inch in length, the 
bases of the tentacles broadening and coming in contact one with 
another on each side. When the animal is fully displayed, the ten- 
tacles and the upper part of the column are nearly colourless, and 
have the appearance of a transparent film. 
Abundant on stones near low-tide mark ; sometimes attached to 
sea-weed. 
Order ZOANTHARIA, M.-Edw. 
Suborder ActiniartA, M.-Edw. 
Fam. Actiniip#, M.-Edw. 
SaGarTIA PARASITICA, R. Q. Couch, sp. 
This species is invariably seated upon shells inhabited by Hermit 
Crabs, Cassis sulcosa, Dolium perdix, Triton nodiferus, Sc. 
SAGARTIA AFFINIS, sp. 1. 
This species is closely allied to the last, and like it is always found 
upon shells of which Hermit Crabs have taken possession, some- 
times in company with it, sometimes alone. Its base is capable of 
great extension ; and its column rises pillar-like, of a diameter very 
much less than that of the base. When contracted it will often lie 
so flat as to be scarcely thicker than a sixpence. The ground-colour 
of the column is yellow; and there are five broad, more or less fus- 
cous longitudinal bands, which, when the body is contracted, lie 
star-like upon it. Sometimes there is an irregular whitish transverse 
band placed nearer the disk than the base ; and in some specimens 
a number of white longitudinal streaks have been observed near the 
base. The inside of the mouth is orange. The disk itself is yel- 
lowish, the tentacles grey, numerous, in four or five rows. ‘The 
