362 
MOLLUSCA. 
Genus Amoroucium. 
A. proliferum, Edw. 
Belfast Bay, W. T. 
A. albicans, Edw. 
Dredged from several fathoms in Belfast Bay (1839), and on the Gal- 
way coast (1840), W. T. 
Mr. M‘Calla mentioned to me that he had collected this species on 
the Irish coast. 
Genus Leptoclinum. 
L. gelatinosum , Edw. 
On the roots of Laminarice, in Belfast Bay, W. T. 
L. maculosum, Edw. 
On the roots of Laminarice in Belfast Bay and North of Ireland ge- 
nerally ; — our most common Leptoclinum, W. T. 
L. asperum, Edw. 
With last. 
L. auream, Edw. 
Dredged in Strangford Lough, Mr. Hyndman and W. T. 
Genus Botryllus. 
B. Leachii, Sav. 
North-East of Ireland, occasionally investing the roots of Laminaria 
digitata, & c. ; when dried, it has somewhat the appearance of a sponge. 
This species was sent by Leach to Savigny, who marks it with doubt as 
from the English coast. On the shores of Naples it has been found by 
Della Chiaie, as above cited. 
B. Schlosseri, Linn. 
I have occasionally obtained this on Algce in the Loughs of Strang- 
ford and Belfast, and have found it attached to stones at the island of 
Lambay, Dublin coast. 
B. polycyclus, Sav. 
This very beautiful species, which is admirably described by Savigny, 
I have found much more common in the North of Ireland than the B. 
Schlosseri ; it occurs chiefly on the leaves of Laminaria digitata. The 
Adriatic Sea and La Manche are the localities whence Savigny pro- 
cured it. What Della Chiaie figures as a variety of this species, tab. 36, 
fig. 9, has occurred to me as commonly as the ordinary state. 
B. gemmeus, Sav. 
Adhering to Fuci dredged in Belfast Bay, by Edmund Getty, Esq. 
B. bivittatus, Edw. 
With last. 
