362 MOLLUSCA. 



Genus Amoroucium. 

 A. proliferu7n, Edw. 

 Belfast Bay, W. T. 



A. albicans, Edw. 



Dredged from several fathoms in Belfast Bay (1839), and on the Gal- 

 way coast (1S40), W. T. 



Mr. M'Calla mentioned to me that he had collected this species on 

 the Irish coast. 



Ge7ius Leptoclinum. 

 L. f/elatinostim, Edw. 

 On the roots of LaminaruB, 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. aureum, Edw. 

 Dredged in Strangford Lough, Mr. Hyndman and W. T. 



Genus BoTRTLLUS. 



B. Leachii, Sav. 



North-East of Ireland, occasionally investing the roots of Laminaria 

 dic/itata, &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 

 Delia Chiaie, as above cited. 



B. ScJdosseri, Linn. 



I have occasionally obtained this on Alr/cs in the Loughs of Strang- 

 ford and Belfast, and have found it attached to stones at the island of 

 Lambay, Dublin coast. 



B. poli/ci/clus, 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 difiitata. The 

 Adriatic Sea and La Manche are the localities whence Savigny pro- 

 cured it. What Delia 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. hivittatus, Edw. 

 With last. 



