L. pallidula, Da Costa. Like the last, rare and small. Larne, Magheramorne, and Kircubbin were its only occurrences to me, but Stewart got it also at Belfast.

Littorina obtusata, Linn. Occurred in nearly every deposit.

var. æstuarii. Sparingly at Alexandra Dock and Downpatrick. Frequent in certain zones at Magheramorne, with a spire as high as L. rudis.

L. neritoides, Linn. Very sparingly in the Larne clay. Jeffreys records it from Belfast on Bell's authority.

L. rudis, Maton. Was found sparingly in almost every bed.

var. tenebrosa. In the Belfast bed Grainger met with it "rather frequently"; Stewart says "scarce." To the writer one example occurred in the upper clay at Alexandra Dock. Bell notes it from Magheramorne.

L. litorea, Linn. Present at every station, and usually in abundance. * Rissoa calathrus, Forbes and Hanley. Recorded by Bell from Magheramorne.

R. reticulata, Montagu. As already recorded by me, this species occurs sparingly in the Magheramorne bed.

* R. cimicoïdes, Forbes. Magheramorne, Bell.

*R. punctura, Montagu. Noted by Bell from Magheramorne.

R. costata, Adams. Rather frequent in the clay at Kircubbin. * var. alderi is noted by Bell from the Magheramorne bed. Trochus helicinus, Fabricius. I found it frequently at Magheramorne, and sparingly at the West Bank.

T. magus, Linn. Of frequent occurrence at Magheramorne and Kircubbin; rare at Alexandra Dock, West Bank, Newtownards, and Greenore. The Magheramorne shells were very fine, measuring up to 1 inch in height by 1 in breadth. The proportion of height to breadth in this species is variable. The specimens from the Newtownards clay were very flat.

T. cinerareus, Linn. The distribution of this variable species in the estuarine clays is irregular. While quite absent from the Lough Foyle clays, it occurs in immense numbers in the deposits of Larne Lough. It is diffused in varying abundance in the different zones of the Belfast clays; is abundant at Kircubbin, Newtownards, and Greenore, and occurs at Downpatrick.

T. umbilicatus, Montagu. Rarer than the last, but is found at Larne and Magheramorne, Belfast, Newtownards, Kircubbin, and Greenore. T. millegranus, Philippi. A few examples of small size in the Downpatrick deposit.

Phasianella pulla, Linn. This pretty shell has been overlooked in previous lists of the estuarine clay shells, but is frequent in the clay at Magheramorne, and also at Larne, Kircubbin, and Downpatrick.

R. parva, Da Costa. Compared with its present profusion on our shores, this species is conspicuously rare in the estuarine clays. Though occurring at a number of stations, from Larne to Greenore, it was rare nearly everywhere.

var. interrupta. One example was obtained from the gravel underlying estuarine clay at Larne.

R. inconspicua, Alder. At Eglinton, Larne, and Magheramorne sparingly, and more frequent at Alexandra Dock. In Stewart's Paper, and in the writer's list of Alexandra Dock fossils, R. albella and R. inconspicua were confounded under the latter name; hence an erroneous estimate is there given of the abundance of the present species in the Belfast beds.

var. sublevis, Marsh. Specimens from West Bank have been so named by Mr. J. T. Marshall.

R. albella, Lovén. This rare shell, which, as a recent British species, is known from Bantry Bay only, is one of the most characteristic estuarine clay Rissoæ, occurring generally in profusion in almost every deposit. I have it noted from Limavady Junction, Eglinton, Larne, Magheramorne, Alexandra Dock, West Bank, Holywood, Newtownards, Kircubbin, Downpatrick and Greenore; in several of these beds it is the most abundant univalve. As an estuarine clay fossil it was first recorded by Bell, from Maghera

morne.

var. sarsii. Occurs with the type at a number of stations, but is less abundant. Its recent distribution is directly the reverse of this. R. membranacea, Adams. In almost every deposit, and generally abundant. Occurs in Thracia and Scrobicularia clays alike. var. venusta. Frequent with the type at Greenore.

var. elata.

Fine examples occurred in small numbers with the typical form at Limavady Junction, Larne, Newtownards, and Downpatrick.

R. violacea, Desmarets. Alexandra Dock, West Bank, and Magheramorne, in sparing numbers.

var. ecostata.

A few specimens of the ribless form were obtained from the Magheramorne clay.

* R. costulata, Alder. Noted by Bell as found at Magheramorne.

R. striata, Adams. Generally distributed; rare in the Belfast Lough beds, but exceedingly abundant in the corresponding deposits in Larne Lough.

var. arctica. Occurs with the type at a number of stations, being often at least equally abundant. Mr. J. T. Marshall remarks that some of the R. striata which I sent him (from several stations) form a connecting link between that species and R. proxima, and in their extremely fine spiral striæ and other respects resemble the latter so closely as to excuse anyone for mistaking the species.

R. vitrea, Montagu. Sparingly distributed, but occurring at Eglinton, Larne, Alexandra Dock, West Bank, and Downpatrick. The specimens were often of fine size. One or two specimens obtained in Turbot Bank sand, by Hyndman, constitute its only recent record in the North of Ireland.

R. semistriata, Montagu. In the Newtownards clay, very rare.

R. cingillus, Montagu. In the lowest zone (black gravel) of the Larne estuarine series a number of examples were obtained. Hydrobia ulva, Pennant. Common at almost every station, and

occurred at all.

var. barleei was noticed in the Eglinton clay.

Jeffreysia opalina, Jeffreys. This pretty little shell, whose only Irish record, in either a recent or a fossil state, rests on two dead specimens from Roundstone Bay, county Galway, now in the collection of Mr. J. T. Marshall, occurred in the estuarine clay at a number of places. At Larne (two stations), Magheramorne, Newtownards, and Downpatrick, it was frequent, and a single specimen was obtained in clay from the West Bank.

Skenea planorbis, Fabricius. Abundant in the Larne Lough beds and at Downpatrick. Sparingly at Limavady Junction, Magheramorne, Kircubbin, Newtownards, Newcastle, and Greenore.

Homalogyra atomus, Philippi. Stewart, Bell, and myself have successively observed this minute shell in the Magheramorne deposit, where it is somewhat abundant. It is also diffused throughout the different zones of the Larne clays, and occurred sparingly at West Bank and Downpatrick.

H. rota, Forbes and Hanley. Sparingly with the last at Magheramorne and Downpatrick. A tiny species, the smallest of British shells.

Cacum glabrum, Montagu. At Larne, Magheramorne, and Newtownards sparingly. Bell marks it in his list as found at Belfast also. Turritella terebra, Linn. Was present in most of the deposits: its profusion in the Lough Foyle beds has already been commented on. Some examples are of unusual size. Grainger mentions a fine specimen from Belfast, 2 inches in length, which, alas! mysteriously disappeared when on exhibition in Section D at the British Association Meeting in 1852, and for the restoration of which to its rightful owner he issues a pathetic appeal. A large example obtained by the writer at Alexandra Dock was 27 inches long, and several Magheramorne examples attain 24 inches. Scalaria turtona, Turton. Long recorded as common at Belfast, where it is a characteristic shell of the deep-water deposit; the specimens are of very small size, averaging only inch in length; 1 inches in the length given by Jeffreys. It is an inhabitant of the coralline zone (10-50 fathoms), but its occurrence in the deposit would show that it occasionally inhabits less depths. It also occurred sparingly at Limavady Junction. Grainger quotes it under S. trevelyana, Leach.

Aclis ascaris, Turton. One specimen was obtained at Limavady Junction.

A. supranitida, S. Wood. Stewart records it from Belfast in his annotated list, but, in the Table which follows, enters it in the Larne Lough (Magheramorne) column; the author informs me that the tabular list is to be taken in preference to the other. I obtained a few specimens at Alexandra Dock, West Bank, and Magheramorne.

Odostomia minima, Jeffreys. Stewart records a single specimen from Magheramorne, and Bell includes it in his Magheramorne list. But the remarkable abundance and comparatively gigantic size of this extremely rare and tiny species in the Magheramorne clay

(where alone I met with it) deserves special mention. The only Irish record for it in a recent state rests on a few specimens from Birterbuy Bay (Jour. Conch., vol. vi., No. 7), and its only locality as an Irish fossil is that quoted above. From a packet of floatings of Magheramorne clay, one-fourth cubic inch in bulk, I picked out no less than sixty examples of O. minima, and the clay enclosed between the closed valves of a Pecten maximus from the same deposit yielded nineteen fine specimens. As regards its unusual size, Mr. J. T. Marshall writes to me: "Whereas recent examples never exceed half a line in length, and have four whorls only, yours are twice as long, four times the bulk, and possess six whorls. It looks as if the species were depauperating and dying

out."

O. albella, Lovén. One specimen occurred in clay obtained on the West Bank in Belfast Lough, sixteen feet below the surface. New to Ireland.

*O. rissoides, Hanley.

O. pallida, Montagu.

Recorded by Bell from Magheramorne.

Recorded by Grainger from the Belfast bed under the name O. eulimoides, Hanley. Stewart and Bell obtained it at Magheramorne. In addition to the station last-mentioned, where it is somewhat abundant, it occurred to me at Eglinton, Limavady Junction, Alexandra Dock, West Bank, and Newtownards. Bell makes a distinction between 0. eulimoides, Hanley, and O. pallida, Montagu, and records both from Magheramorne.

O. conoïdea, Brocchi. One example obtained at West Bank. There is no previous record from the North of Ireland.

O. acuta, Jeffreys. Recorded by Stewart from Belfast and Magheramorne. To the writer, also, it occurred in both deposits, the Belfast station being West Bank.

O. unidentata, Montagu. A single specimen at Magheramorne was its only occurrence. At the present day it is one of our commonest local Odostomiæ.

*0. plicata, Montagu. Is recorded by Bell from the Magheramorne clay.

O. insculpta, Montagu. West Bank, very rare.

O. indistincta, Montagu. Sparingly at Limavady Junction and Magheramorne. Stewart records it from Belfast.