Cliona. ZOOPHYTA. CORALLINADiE. 517 
and are connected internally with ramified canals, in the vicinity of which 
small yellow ova make their appearance in March and April ; the papillae 
eject a current of water ; the marginal polypi are long, slender, and transpa- 
rent, and their broad tentacula are slightly dilated at the extremities. 
<jKN. XL. ALCYONIUM. — Circle of tentacula complete ; 
fleshy bi es, arborescent, investing or adnate, and regularly 
covered with polypiferous papillae.— Marine. 
86. A. gelaimosum. — -Sea-ragged staff or grain. Arborescent, 
the polypi t ith 1 2 equal tentacula. 
Fucus s vigiosus nodosus, Ray. Syn. St. p. 49. Ellis., Cor. p. 87. t.xxxii. 
Al. molle, ramosum. Bast. Op. Sub. i. p. 25. t. i. f. v. — A. gel. 
- / 'oi. Dan. t. cxlvii. f. 1-4 ^Not uncommon in deep water. 
I.; by a narrow base to stones and shells, in from 5 to 20 fa- 
isc aiding and subdividing irregularly into rounded branches, 
with rubac ? te rminations ; the surface is covered with minute, rounded tu- 
pale, perforated, quadrisulcated summits, from which issue 
)oIypi, iuvei ,|jy bell-shaped, with 12 equal tentacula; internally, it is sub- 
ielluiar, with g.'attered round black bodies, ivhich are probably the eggs. 
The w'liole is g reenish, translucent, -with a smooth and gelatinous aspect. 
This species ]ias frequently been claimed by botanists, without due consi- 
deration, as a bject of the vegetable kingdom. It is the Fucus gelatinosus 
of .Hudson ''s 'Fj ora Anglica, the Ulva diaphana of Smith’s English Botany, 
a.ad the Alcyoni, imni diaphanum of Hooker’s Flora Scotica. 
87 A M. sutum . — Body investing, the polypi with from 18 
to tentatrila. 
luvesting .fuel, common. 
This Species differs from the preceding in the following particulars. It 
grows in shallower water, among fuel and confervse, while the other is the 
■compaiuoR of Sertularise and Fiustrse. Its growth is irregular, frequently 
anastomosing, surrounding or connecting fuel, sometimes rising into blunt, 
thinly subdivided, branches. It is of a closer texture, and the surface, being 
covered with close set conical accuminated papillae, gives it a hairy appear- 
ance. The polypi are not protruded so far from the orifice of the papillae, 
and the feelers, which are more numerous, are constantly in motion. Some 
doubts may be entertained if part of the synonimes prefixed to the preceding 
species do not belong to the Mrsutum. The one, however, in the ^ool. Dan. 
is too faithful a representation of the gelaiinosum to admit of such a suspi- 
cion. 
88. A. ecJiinatum . — Body inemsting dead univalve shells ; 
the polypi with 12 tentaculse. 
This species incrusts dead univalve shells exclusively; and is about the gstli 
of an inch in thickness. When first taken out of the water it is soft and 
spongy, but becomes rigid on drying ; the surface is closely covered with tu- 
bular papillae about ^ otli of an inch in length. 
The late Mr Montagu, in a letter to me, dated 12th July 18. 1, intimated, 
in reference to a specimen which I had sent him : “ The crusts on shells, 
which gives them a muricated appearance, is what I have called Alcyouium 
echmatum, I do not know that it has been described or ascertained to be the 
