GASTEROPODA. 
315 
R. punctura, Turt. 
Owing to the confusion between this and the next species, the localities 
of Bundoran and Kilkee only, whence specimens are before me, shall be 
noted. From Burrow Island, Devonshire, it has been supplied me by 
Mr. Barlee. 
R. inconspicua, Alder. 
One specimen found at Portmarnock, 1838, W. T. ; one at Bundoran, 
1840, Mrs. Hancock. 
R. semicostata, Mont. 
Noticed by Turton as found at “ Seafield, on the Atlantic, ” in Ireland, 
rare ; and by Mr. O’Kelly, as obtained on the Dublin coast. I have not 
seen any shell agreeing with the description or figure of Montagu. 
R. Bryerea , Mont. 
Brown mentions his having seen one specimen from Portmarnock. 
Among shell-sand from Magilligan, one in Mr. Hyndman’s collection was 
procured. Extremely rare. 
R. striata , Dillwyn. (Desc. Catal. vol. ii. 859.) 
Common around the coast. Found under stones in oozy, gravelly, and 
stony pools, between tide-marks. I have remarked them in Belfast Bay 
in summer clustered together, to the number of about a dozen, on the 
under surface of stones. Several of these clusters on one stone have a 
pretty appearance. Dredged from a depth of a few fathoms ; occasionally 
found on oysters ; among shell-sand also. This and R. parva seem to be 
the most generally distributed of the Rissoce around the coast. . 
R. labiosa, Br. Turt. 
In suitable localities around the coast, muddy banks being its favourite 
resort. On these, within and below low-water, it is common and fine in 
Belfast Bay. A very observant wild-fowl shooter, in sending me some 
specimens from a bank here to which the golden plover is partial, re- 
marked that he always finds this species on the leaves of the “ sleech- 
grass ” ( Zostera marina ), on which he supposes it to feed, and never, like 
other Rissoce , on Fuci. In the stomach of the grey mullet, and in that of 
various species of birds ( GralLatores and Natatores ) which feed on the oozy 
banks of Belfast Bay, I have found this shell, as well as R. ulvce , but the 
latter was the more numerous. Bundoran, Warren. 
R. ventricosa, Mont. Dublin Bay, Turton. 
R. ulvce, Br. Turt. 
Common in suitable localities around the coast. Banks of soft sand 
and ooze between and beyond tide-marks often, as in Belfast Bay and 
Strangford Lough, & c., produce it in vast profusion. It is the chief food 
of the grey mullet here in spring, when it roves feeding along these banks, 
and of various birds at all times of the year. 
R.fulgida, Mont, (sp.) 
Taken about the roots of sea-weed at low-water, Birterbuy Bay, by 
Mr. Barlee. 
