454 
ZOOPHYTES. 
Found commonly attached to other Zoophytes, picked from the trawl- 
nets of the Howth (Co. Dublin) fishermen, Dr. Ball and W. T. On the 
stems of Laminaria digitata , thrown ashore in Belfast Bay, and similarly 
procured at Youghal, Miss Ball. Magilligan, Mr. Hyndman. 
Much more delicate and graceful when springing from the stem of its 
kindred species ( Sertularia argentea , Plumularia falcata, &c.) than from 
those of the Lam. digitata, the colour also in the former case being of a 
brighter and more agreeable hue. In the same locality, Belfast Bay, it 
differs thus according as it emanates from a Zoophyte or Laminaria. The 
much stronger and more robust development of S. rosacea on the stems 
of Lam. digitata, remind me of the equally greater development of an 
Alga ( Ptilota plumosa ) upon its stems, than when springing from a rock, 
and in so far as specimens have come under my observation, each state of 
the Zoophyte is as permanent, according to the object upon which it is 
based, as is the case in the Alga. 
The vesicles too, it should be mentioned, differ ; those on my S. rosacea 
based on the Zoophyte are admirably represented in Ellis’s Cor., pi. 4, 
fig. A. 
S. pumila, Linn. 
Antrim, Down, and Dublin coasts. Clifden, Connemara, W. T. 
A littoral species growing on the Fuci (especially F. serratus, F. nodo- 
sus, and F. vesiculosus ), in shallow water, and those exposed to the air at 
every ebb of the tide. At the island of Ireland’s Eye (Dublin coast), it 
most profusely invests the Fuci exposed at low water, so that a person 
might say with truth that he could walk for some distance treading all 
the time on S. pumila. W. T. 
On Furcellaria fastigiata, &c. At Youghal, Miss Ball.* Ballysodare 
Bay, Co. Sligo, Mrs. Hancock. Magilligan, Mr. Hyndman. Ballantrae, 
Ayrshire, and Fresh-water Bay, Isle of Wight, W. T. Foreign specimens 
are in my collection from California, Cape of Good Hope, and Van Die- 
men’s land. 
April 14th, 1841. 
It not only grows abundantly on Fuci attached to large stones between 
tide-marks at Cultra, but the entire otherwise bare side of a huge stone is 
bearded with it. Fuci however droop over the side of the stone from 
above, rooted on the top of the stone. 
S. pinaster, Ellis. 
This species, exactly as represented by Ellis, and bearing vesicles, was 
dredged at the entrance to Belfast Bay, by Mr. Hyndman, who has ob- 
tained it by similar means from a depth of 40 fathoms near Sana Island, 
on the Scotch coast, both in 1841 and 1842, but on both occasions the 
few specimens were without vesicles, as was likewise a specimen dredged 
by Capt. Beechy, B. N., off the Mull of Galloway, at the depth of from 
110 to 140 fathoms. In some cases a single plume, in others several, 
spring from the same base. The branches are more produced than re- 
presented by Ellis and Solander, and in one instance secondary branches 
are thrown out, as we see in luxuriant specimens of its near allies, Sert. 
abietina, and S.Jilicula. Dr. Hassall’s Sert. Margarita seems to me only 
a variety of this, differing in the vesicles. Specimens of the form he de- 
* In whose collection are specimens from this locality in a free branched 
state, not adherent to any other object. 
