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L. pallidula, Da Costa. Like the last, rare and small. Larne, Maghera
morne, 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
potes 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 Kir
cubbin ; rare at Alexandra Dock, West Bank, Newtownards, and Greenore. The Magheramorne shells were very fine, measuring up to 1 inch in height by lf 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 Down
patrick 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 under
lying 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. sublævis, 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 Magheramorne. 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 Maghera
morne, 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 succes
sively 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 Maghera
morne and Downpatrick. A tiny species, the smallest of British
shells. Cæcum glabrum, Montagu. At Larne, Magheramorne, and Newtown
ards 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, 24 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 21 inches. Scalaria turtone, Turton. Long recorded as common at Belfast, where
it is a characteristic shell of the deep-water deposit; the speci. mens are of very small size, averaging only inch in length ; 11 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 0. 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
0. albella, Lovén. One specimen occurred in clay obtained on the West
Bank in Belfast Lough, sixteen feet below the surface. New to
Ireland. *0. rissoides, Hanley. Recorded by Bell from Magheramorne. 0. pallida, Montagu. Recorded by Grainger from the Belfast bed
under the name 0. 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 New. townards. Bell makes a distinction between 0. eulimoides, Hanley, and 0. pallida, Montagu, and records both from
Magheramorne. 0. conoïdea, Brocchi. One example obtained at West Bank. There
is no previous record from the North of Ireland. 0. acuta, Jeffreys. Recorded by Stewart from Belfast and Maghera
momne. To the writer, also, it occurred in both deposits, the
Belfast station being West Bank. 0. 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. 0. insculpta, Montagu. West Bank, very rare. 0. indistincta, Montagu. Sparingly at Limavady Junction and Maghera
morne. Stewart records it from Belfast.
orded by S. North of Irelanwest Bank.