GASTEROPODA. 315 



H. punctura, Turt. 

 Owing to the confusion between this and the next species, the localities 

 of Bimdoran and Kilkee only, whence specimens are before me, shall be 

 noted. From Burrow Island, Devonshire, it has been supplied me by- 

 Mr. Barlee. 



H. inconspicua, Alder. 



One specimen found at Portmarnock, 1838, W. T. ; one at Bundoran, 

 1840, Mrs. Hancock. 



a. 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. 



JR. 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. sb-iata, 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 Rissocs around the coast. 



Jt. lahiosa, 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 Avhich 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 Rissuce, on Fuci. In the stomach of the grey mullet, and in that of 

 various species of birds {Gra/latores and Katatores) 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. ulvcs, 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. fuJgida, Mont, (sp.) 



Taken about the roots of sea-weed at low- water, Birtcrbuy Bay, by 

 Mr. Barlee. 



