of the North of Ireland. 
65 
Modiolaria costulata, Risso. 
Found at Bundoran, Co. Donegal, by Mr. Waller— Jeffreys. 
Modiolaria discors, Linne. 
“Lame Longb, not nncommon. Donagbadee, 8 to 10 fathoms, Dr. Drum- 
mond” — Thompson (sub Modiola discrepans). “Living, rare, at the roots 
of Antennularia and other Zoophytes, in from 10 to 25 fathoms ” — Hyndman, 
who also obtained it, dead, on the Turbot Bank {sub Grenella discors). Craw- 
fordsbum, Mr. S. A. Stewart — Belf. Mus. Coll. 
Crenella rhombea, Berkeley . 
“Bundoran (Waller)” — Jeffreys (Supplement). 
Crenella decussata, Montagu. 
Living in gravelly sand, in 15 to 30 fathoms, off Donaghadee, Black Head, 
and Lame, and it was one of the few species which Hyndman obtained alive 
in Lame Lough (4-5 fathoms). Thompson’s only Irish note of the species 
states that Mr. Hyndman dredged a few odd valves in Strangford Lough ; 
Dickie took it alive in 18-20 fathoms at the entrance of the latter. 
Nucula nucleus, Linne. 
Abundant, living in 5-90 fathoms, in sand and gravel, throughout the North 
of Ireland. 
var. radlata, though stated by Thompson {sub N. margaritacea) to be common 
around the coast, has apparently a more limited distribution in our waters. 
Nucula nitlda, G. B. Sowerby. 
Living in mud and sand in from 12 to 20 fathoms, off Donaghadee and 
Black Head — Hyndman ; and frequent in 4-25 fathoms in Strangford Lough 
— Dickie. Hyndman also records it, with doubt, from 1-4 fathoms, Brown’s 
Bay, Island Magee. Dead shells occur on the Turbot Bank. 
Xfucula tenuis, Montagu. 
Hyndman records having dredged this species alive in deep water near the 
Maidens, and specimens labelled as from that locality are in the Belfast 
Museum. 
Xieda pygmaea, Munster. 
“ On the Antrim Coast” — Jeffreys (all said of it). Belfast Lough — Belf. 
Mus. Coll. It is rare as a British species, inhabiting chiefly the Scandinavian 
and arctic seas. 
leda xninuta, Muller. 
Portrush ; 23 fathoms in Belfast Bay ; and 50 fathoms off South Eock, Co. 
Down ; all by Mr. Hyndman— Thompson {sub Nucula minuta). In his sub- 
sequent systematic exploration, Hyndman obtained it occasionally, living in 
mud, gravel, and sand, in from 12 to 90 fathoms, and more frequently dead, in 
1-90 fathoms ( sub L. caudata ). Dickie took it alive in Strangford Lough. 
Pentunculus glycymeris, Linne. 
Living in sand and gravel in 10-90 fathoms all round our coast ; and more 
