of the North of Ireland . 
63 
Pecten striatus, Muller. 
“A single specimen dredged in Strangford Lough in 1837 by Mr. Hynd- 
man and myself ” — Thompson. Hyndman obtained it twice alive off Donagh- 
adee, in 12 and 20 fathoms respectively, and also in 70-90 fathoms off the 
Maidens, and dead on the Turbot Bank. Dickie dredged dead valves in Strang- 
ford Lough. 
Pecten siznilis, Laskey. 
No note of its having been taken alive, hut dead valves have been dredged 
frequently at the mouth of Belfast Lough, in 15-35 fathoms, and Dickie 
records the same from the entrance of Strangford Lough, 12-15 fathoms. 
Pecten mazimus, Linne. 
Common here as elsewhere, living in 7-25 fathoms. “Along the Antrim 
and Down coasts, where it is commonly called clam, and used as human food, 
though not so generally esteemed as the scallop ( P . opercular is) ” — Thompson. 
Xiima subauriculata, Montagu. 
Dead valves only, in from 4 to 90 fathoms on various parts of the Antrim 
and Down shores, by the Ordnance Survey collectors, Thompson, Hyndman, 
and Dickie. 
Xiima Xioscombii, G. B. Sowerby. 
“Dredged very sparingly, alive, in the deeper portions of Belfast and 
Strangford Loughs, on sandy and shelly ground. Single valves of large size 
obtained in quantity from 23 fathoms at the entrance to the former by Mr. 
Hyndman. Obtained occasionally in the stomach of haddock taken on 
the North-East coast ” —Thompson, whose L. fragilis also belongs to this 
species. Hyndman procured it frequently, both living and dead, in 15-90 
iathoms ; Dickie took it alive outside Strangford Lough, in 12-15 fathoms. 
Xiima Ilians, Gmelin. 
‘ ‘ The Ordnance Museum contains upon a card a fresh-looking specimen 
of this shell, as dredged from 7 fathoms in Belfast Bay” — Thompson 
(sub L. tenera). Hyndman’s only note of it is a repetition of this record. 
From a note in Jeffreys’ work, Waller would appear to have taken it some- 
where on the North-East coast, and the Belfast Museum Collection contains a 
specimen of Thompson’s labelled “ Belfast Lough.” 
It is very doubtful if this species can be now reckoned among our indi- 
genous mollusks ; but it lived in abundance in our waters at no very distant 
date, for the Estuarine Clay at Magheramorne, on Larne Lough, yields it in 
the greatest profusion, and it has been found in the similar deposit at Belfast. 
Pinna rudis, Linne. 
This fine species, our largest British shell, inhabits the waters off Black 
Head (25-30 fathoms), where it has been obtained by Hyndman (P. pectinata ) 
and others. Thompson mentions (sub P. ingens) a wider distribution ; he says 
of it, “the very few specimens, all taken in deep water, which I have seen 
from the coasts of Londonderry, Antrim, Down, and Louth, were of large 
