THE BELFAST DREDGING COMMITTEE. 283 
dead shells far exceed the living in number, the latter being for the most 
part sparingly scattered, except in the case of a few gregarious species. 
Lists are appended of the species obtained from the different dredgings, 
from which it will be seen that since last year the following have been 
added :— 
A. Arctic. N. Northern. S. Southern. 
§. Pholadidea papyracea. Discovered in the dredgings of 1857, imbedded in rolled lumps 
of hard clay, and again in the deep water this season. Recorded by the late W. 
Thompson as found at Portrush by the Ordnance Survey Collectors. 
S. Lepton nitidum. Tutbot-bank sand, Mr. Waller; new to the Irish list. 
S. Montacuta ferruginosa. Turbot-bank sand, Mr.Waller. Recorded by the late W. Thomp- 
son, Dublin coast and south of Ireland. 
§. Nucula tenuis. Living in deep water, Maidens, Mr. Hyndman. Recorded by the late 
W. Thompson ; Mr. Warren, Portmarnock. 
S. Argiope cistellula?, living. This interesting addition to the Irish fauna was first dis- 
covered by Mr. Hyndman in the dredgings of 1857, and again taken by the party in 
1858. It seems to be abundant on dead bivalves incrusted with Serpule. 
Terebratula capsula, living. This new species, taken with the foregoing, proves to be 
the same as the shell found by Mr. Norman at Plymouth, and named by Mr. Jeffreys 
in the ‘ Annals of Nat. Hist.’ for January 1859. 
N. Margarita undulata (Sowerby). Turbot-bank sand, Mr. Jeffreys ; new to the Irish list. 
N. —— pusilla ( ). Turbot-bank sand, Mr. Jeffreys ; new to the Irish list. 
N. —— cinerea (Couthouy). Turbot-bank sand, Mr. Jeffreys; new to the Irish list. 
Rissoa soluta. Turbot-bank sand, Mr. Jeffreys. ‘ 
Skenea divisa. Turbot-bank sand, Mr. Jeffreys. 
Cerithium niveum (Lovén), dead. This interesting addition to the British list was de- 
termined by Mr. Jeffreys from the Turbot-bank sand. 
Scalaria Eschrichti (Holb6ll), dead. In Turbot-bank sand, Mr. Waller, 1857. Described 
by him in the ‘ Transactions of the Royal Dublin Society,’ and named provisionally 
Turritella Hibernica, but now ascertained by Mr. Jeffreys to be the Scalaria men- 
tioned. Recently discovered by Mr. Jeffreys “in the collection of Mr. Maccullough of 
8 ee picked up on the beach at Herm together with other undoubtedly British 
shells.” . 
N. Eulimella Scille, dead. Turbot-bank sand, Mr. Waller and Mr. Hyndman. 
—acicula, dead. Turbot-bank sand, Mr. Waller and Mr. Jeffreys. 
Chemnitzia rufa, dead. Turbot-bank sand, Mr. Jeffreys. 
— scalaris, dead. Turbot-bank sand, Mr. Jeffreys. 
— interstincta, dead. Turbot-hank sand, Mr. Jeffreys. 
Odostomia dubia, dead. Turbot-bank sand, Mr. Jeffreys. 
— nitida, dead. Turhbot-bank sand, Mr. Jeffreys. 
—rissoides, dead. Turbot-bank sand, Mr. Jeffreys. 
— cylindrica, dead. Turbot-bank sand, Mr. Jeffreys. 
insculpta, dead. Turbot-bank sand, Mr. Jeffreys. 
— decussata, dead. Turbot-bank sand, Mr. Jeffreys. 
—— truncatula, dead. Turbot-bank sand, Mr. Jeffreys. Plymouth Sound is the only 
other known locality of this shell. 
Natica clausa, dead. Turbot-bank sand, Mr. Jeffreys. 
Trophon scalariformis, dead. Turbot-bank sand, Mr. Jeffreys; new to the British list. 
Mangelia Trevelliana, dead. Turbot-bank sand, Mr. Jeffreys. 
— Leufroyi, dead, but very fresh. Turbot-bank sand, Mr. Hyndman and Mr. Waller. 
— scabra, dead. Turbot-bank sand, Mr. Jeffreys. 
Buccinum cyaneum. A fragment only, considered by Mr. Jeffreys to be this species, in 
Turbot-bank sand, Mr. Waller. 
Cylichna mammillata, dead. Turbot-bank sand, Mr. Waller. 
—  umbilicata, dead. Turbot-bank sand, Mr. Waller. 
ee. 
The interesting question, however, still remains undetermined, as to 
whether these Northern species may be considered as still living in this 
region, or as having been washed out of some submerged pleistocene bed. 
Upon this point I feel myself incompetent to offer a decided opinion without 
further investigation, but would refer to the observations on the subject 
published by Mr. Jeffreys in the ‘Annals of Natural History’ for August 
1858, and by Mr. Waller in the ‘ Transactions of the Royal Dublin Society ’ 
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