RISSOA. - 65 
variety elata at Cumbrae plentifully, but I have not met 
with it. Mr. Norman has the type from Kames Bay, 
Cumbrae ; and the variety from Lamlash Bay, Arran. 
British distribution—Throughout most parts of our 
coasts; rather common. 
Foreign localities—Norway (Lovén and others), northern 
and southern Spain and Portugal (M‘Andrew), the Mediter- 
ranean, Adriatic, Aigean, and Black Seas (various collectors), 
Canaries (Andrew). 
* Rissoa violacea, Desmarets. 
Alvania rufilabrum, Leach ; Rissoa rufilabrum, Forbes and 
Hanley. 
Habitat—N ot uncommon at Cumbrae, off the Battery, in 
a few fathoms. I have taken it also on Bogany Point, Bute; 
and off Silvereraigs, Loch Fyne; but have not found it at all 
plentiful anywhere. Mr. Norman, however, states that it is 
abundant on Zostera in a rock pool on the Allans Rocks, 
Millport Bay. 
British distribution.— Widely diffused, but perhaps some- 
what local. It is on record from the south of England and 
Channel Islands, all round Ireland, and the west of Scot- 
land, as far north as Shetland. 
Foreign localities—From Norway to Spain, the Mediter- 
ranean, Adriatic, and Aigean Seas. 
* Rissoa striata, Adams. 
Turbo striatus, Adams; Turbo semicostatus, Montagu ; 
Cingula striata and C. semicostata, Fleming ; Rissoa 
eracilis, Macgillivray ; Pyramis candidus and P. discors, 
and Rissoa semicostata and R. decussata, Brown ; Rissoa 
minutissima, Michaud. The variety arctica = Rissoa 
arctica, Lovén. 
Habitat—Exceedingly abundant at Farland and Battery 
Points, Cumbrae, and common throughout the district, 
living at and near low water mark on the under sides of 
stones, and amongst the roots of Laminariz. Of the variety 
arctica, dead shells are common down to all depths. 
British distribution.— Common on stony and weedy 
beaches everywhere throughout our islands, 
Foreign localities.—Iceland (Verkriizen), Spitzbergen 
(Torell), Norway (Lovén and others), Holland and France 
to northern Spain (M‘Andrew), throughout the Mediter- 
ranean to the Agean (Forbes), Madeira and Teneriffe 
F 
