RISSOA. 63 
have taken it alive on the Tan Spit, Cumbrae, in about 10 
fathoms. Mr. Norman found it living in rock pools on the 
Allans Rocks, Millport Bay, and abundant in a dead state 
in dredged sand at Lamlash. 
British distribution —Throughout our seas, but probably 
not common in the sense of abundant. 
Foreign localities—Norway and Sweden (Lovén, Sars, 
M‘Andrew, and others), Western France, the Mediterranean 
and Aigean (various collectors), Canary Islands (M‘Andrew),. 
Rissoa abyssicola, Forbes. 
Habitat.—Professor Forbes, the discoverer of this species, 
first obtained it from 100 fathoms in Loch Fyne, on a 
muddy bottom. Since then it has been recorded from the 
same inlet by Mr. Norman and others. I have not been so 
fortunate as to obtain it. 
British distribution.—The following stations are recorded 
in Brit. Con.:—Skye and Hebrides, Shetland, Mizen Head, 
Co. Cork. 
Foreign localities—Norway (Sars and others), Western 
France (De Folin), Northern and Southern Spain 
(M Andrew), Mediterranean (Naves and Spratt). 
~ Rissoa Zetlandica, Montagu. 
Turbo Zetlandicus, Montagu ; Rissoa obtusa, Brown ; 
Cyclostrema Zetlandica, Fleming. 
Habitat—Dead shells and fragments outside Tan Spit, in 
15 to 30 fathoms, on sandy mud, and in 20 fathoms off Silver- 
craigs, Loch Fyne; but only two or three specimens were 
got at each locality, and all dead. Dr. Landsborough in- 
cludes it in his list from Lamlash. 
British distribution.—Searce, and generally (or always ?) 
dead. Mr. Jeffreys gives as localities Guernsey, Cornwall, 
Antrim, Skye, Hebrides, Orkney, Shetland, Caithness, 
Peterhead, Aberdeenshire. The animal appears to be 
unknown. 
Foreign localities—Norway (Jeffreys), Sweden (Malm), 
French coast (Récluz), Spain (Md ndrew), Mediterranean 
Sea, both sides (Philippi, Nares, Weinkauff, and others). 
* Rissoa costata, Adams. 
Turbo costatus, Adams ; Rissoa exigua, Michaud ; Turbo 
lacteus, Donovan (doubtful). It is not the Rissoa costata 
of Desmarets. 
Habitat—In dredged sand received from Lamlash Bay, 
