O. interstincta, Montagu. A few examples at Limavady Junction. Stewart obtained it at Belfast.

O. lactea, Linn. This elegant little shell is the commonest Odostomia of the estuarine clays. In the Belfast and Magheramorne beds it is present in some numbers, and also occurs in the deposits of Lough Foyle, Larne, Newtownards, and Kircubbin.

O. pusilla, Philippi. Eglinton and Magheramorne, rare. I do not find any previous North of Ireland record.

O. acicula, Philippi. Occurred at Limavady Junction and West Bank very sparingly.

O. nitidissima, Montagu. I obtained three examples of this beautiful little shell in the clay at Eglinton.

Eulima bilineata, Alder. A specimen found by Grainger at Belfast, and doubtfully recorded as E. subulata, was, with his concurrence, transferred by Stewart to the present species. One or two examples occurred to me at Alexandra Dock.

*Natica grænlandica, Beck. "Belfast (A. Bell)!"-Jeffreys (Brit. Conch. Suppl.) Mr. Bell writes me that he received the specimen from Mr. Stewart, along with other Belfast estuarine shells. It is a northern form, not now inhabiting the North of Ireland; undoubtedly fossil examples have been dredged on the Turbot Bank at the entrance of Belfast Lough, and it is possible that this was a transported specimen.

N. catena, Da Costa. Belfast bed only, where it was found sparingly by Grainger, Stewart, and the writer.

N. alderi, Forbes. Abundant in the Belfast deep-water zone. Sparingly at Eglinton and Magheramorne.

Aporrhaïs pes-pelecani, Linn. The abundance of this well-known shell in the Belfast clay has been long noted: it appeared equally abundantly at the sections examined by Grainger, Stewart, and the writer (Alexandra Dock). On the West Bank excavations, however, its occurrence was rare; likewise at Limavady Junction and Magheramorne, its only additional stations. It is an inhabitant of the coralline zone.

Cerithium reticulatum, Da Costa. Present in myriads in most of the deposits.

Purpura lapillus, Linn. In the clays at many stations, but sparingly and of small size.

Buccinum undatum, Linn. Abundant at Alexandra Dock and Magheramorne. Rare at several other stations. Grainger found a specimen of the monstrosity carinatum at Belfast.

Murex erinaceus, Linn. Widely distributed in the district, but usually of small size. More frequent at Kircubbin than elsewhere, where the specimens were tiny.

Fusus antiquus, Linn. Rare in the deposits, being noted from only five stations, and sparingly at all of them. Belfast specimens attain four and a-half inches in length.

F. gracilis, Da Costa. One specimen at Alexandra Dock.

Nassa reticulata, Linn. Widely but sparingly distributed. Was abundant at Alexandra Dock only, but occurred in beds from north to south of the district. Bell records the form N. nitida, Jeffreys, from Belfast and Magheramorne.

N. pygmæa, Lamarck. This shell, extremely rare in our present waters, is characteristic of the Thracia zone of the estuarine clays. Its abundance in the Belfast bed has already been commented on by Grainger and Stewart. It is present also in the Lough Foyle beds, at Larne, and at Downpatrick, but conspicuously absent from the Magheramorne deposit. Grainger noted it as N. incrassata. The latter form has now locally replaced N. pygmæa, being a common shell on our shores.

*Defrancia gracilis, Montagu. Stewart obtained one specimen at Belfast. Not now inhabiting the North of Ireland.

Pleurotoma attenuata, Montagu. Several specimens at West Bank. An unnamed specimen in Canon Grainger's collection, found in the Belfast clay, also belongs here.

P. costata, Donovan. Several examples occurred to the writer in the West Bank clay. This species is recorded from the Belfast bed by Grainger, but on examining the specimen Mr. J. T. Marshall refers it to the following species.

P. brachystoma, Philippi. Belfast bed.

Stewart found it sparingly at Spencer Basin, and I at Alexandra Dock and West Bank. As mentioned above, Grainger's P. costata belongs here.

P. septangularis, Montagu. It has been found in the Belfast bed by Bell (Brit. Conch. Suppl.), Stewart, and myself, but is very rare there.

R.I.A. PROC., SER. III., VOL. II.

Y

P. rufa, Montagu. "Belfast deposit," Jeffreys. The estuarine clays are probably intended. Bell notes it from Magheramorne. To the writer it occurred at Newtownards, Kircubbin, Larne, and Eglinton, being frequent at the station last named.

*P. turricula, Montagu. Is noted from the Belfast bed by Grainger and Stewart; did not occur to me.

Cypraea europaea, Montagu. Sparingly but widely distributed in the Belfast bed and at Magheramorne.

*Cylichna nitidula, Lovén. "In the Belfast bed I found one shell". Stewart.

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C. cylindracea, Pennant. A single fine example in the Thracia clay at Alexandra Dock..

Utriculus mammillatus, Philippi. Common at Eglinton and Limavady Junction, and frequent at Downpatrick. Sparingly also at Larne, Belfast, and Newcastle. Bell notes it from Magheramorne.

U. truncatulus, Bruguière. One specimen in the Downpatrick clay.
U. obtusus, Montagu. Sparingly at every station and in every zone of
the Belfast clays. Abundant in the Lough Foyle beds. Rarer at
Kircubbin and in the Larne Lough deposits.

var. lajonkaireana was found sparingly with the type at Limavady Junction. A curious monstrosity also occurred there, having a slender, tapered spire as long as the mouth.

U. hyalinus, Turton. Noted by Stewart as "plentiful in the Belfast and in the Larne beds." To me it occurred, but sparingly, at Magheramorne, Alexandra Dock, and Newtownards.

Acera bullata, Müller. The delicate shells of this species are always broken to fragments by the operation of washing the clay, but the flat angular-whorled top is easily recognizable. It is of rather general occurrence in the clays, being present in the beds of Lough Foyle, Bann, Larne Lough, Belfast Lough, and Lough Strangford.

var. nana. Dwarf examples, apparently this variety, were found at Magheramorne, where Stewart had previously noted them, and at Downpatrick.

Acteon tornatilis, Linn. Grainger records some shells of large size found in the Belfast bed. To me it occurred extremely sparingly

at Alexandra Dock and Magheramorne, but the specimens were of very small size.

Scaphander lignarius, Linn. Grainger found one, Stewart three or four, and the writer one specimen, in the Belfast clay.

Philine scabra, Müller. One specimen only, at Alexandra Dock.

P. aperta, Linn. In the deposits of Lough Foyle, Larne and Belfast Loughs, and Downpatrick, in varying numbers.

Melampus bidentatus, Montagu. Stewart found it sparingly at Magheramorne. The writer obtained it there also, as well as at Larne and Alexandra Dock.

LAND AND FRESH-WATER SPECIES.

Zonites nitidulus, Draparnaud.

Grainger records it from Belfast, and

Bell from Magheramorne. One example occurred to me at Larne pottery.

Z. radiatulus, Alder. A single example at Larne pottery.

*Z. crystallinus, Müller. Is included in Bell's list of the shells of the Belfast clays.

Helix nemoralis, Linn.

To Grainger, Stewart, and myself, a few examples have occurred in the Belfast deposits. A specimen from Alexandra Dock is doubtfully referred to H. hortensis, Müller, by Dr. R. F. Scharff.

H. rotundata, Müller. Grainger found one at Belfast, and the writer several at Larne Pottery.

H. pulchella, Müller. One specimen in the clay at Larne Pottery. Bythinia tentaculata, Linn. Several specimens occurred in the

estuarine clay of the Bann.

Hydrobia ventrosa, Montagu. One specimen in the Downpatrick clay, a few at Holywood and the Bann, and a number at Eglinton. Appears to be rare in the North of Ireland; the only record I find is Larne Lough, in a recent state, on the authority of Dr. Jeffreys.

Limnaa palustris, Müller. In the blue clay examined in the railway cutting at Larne, a single fine example was found.

MAMMALIA.

Sus scrofa, Linn. Two portions of the lower jaw of a large wild boar, with teeth and both tusks, and at another spot a single tusk, were found at Alexandra Dock, on the upper surface of the submerged peat.

Cervus elaphus, Linn.

A dorsal vertebra, right radius, and posterior right rib of the red deer, occurred at Alexandra Dock, in a position similar to the wild boar remains. I also obtained a pelvic bone of this species from the base of the clay in the county Antrim abutment of the new Albert Bridge, Belfast.

Cervus giganteus, Blum. A fragment of an antler, which has been referred by Professor Boyd Dawkins to this species, was obtained by Mr. William Gray, M.R.I.A., from excavations made for the county Down abutment of the new Albert Bridge, in 1890. I have failed to discover the exact position in which it was found, but it was probably on the upper surface of the Boulder clay. A more satisfactory record has recently occurred, when the greater portion of the skull of an Irish elk was found in the excavations made for the foundations of the east wall of the new branch floating dock, opening off Spencer Basin, Belfast. This skull was lying embedded in the submerged peat which, as previously stated, underlies the estuarine clay over the greater portion of the Belfast estuarine area. The peat at this point was three feet thick, and the skull was obtained in the middle of the deposit, at a depth of 26 feet below low-water mark. Above the peat was the usual thick deposit of estuarine clay.

In the following tabulated list of the Mollusca of the estuarine clays, the first sixteen columns show their distribution in the beds at the localities cited, as determined by the writer. A column (A) has been added showing the original recorder of each species as an estuarine clay fossil, and where it was first observed, points which possess some interest in a historical way; to the original finder belongs the credit of any discovery, not to the re-finder. The abbreviations used in this column are as follow:-B - Belfast; M = Magheramorne; L Larne; Lv Limavady Junction; E Eglinton; Nt Newtownards; K = Kircubbin; D = Downpatrick; N = Newcastle; T = Thompson (Nat. Hist. Ireland, vol. iv., 1856);

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