62 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
Rissoa, Fréminville. 
* Rissoa striatula, Montagu. 
Turbo striatulus, Montagu; Turbo carinatus, Da Costa ; 
Cingula striatula, Fleming ; Littorina striatula, Brown ; 
Persephona brevis, Leach. 
Habitat—I obtained a single dead shell and some frag- 
ments off Silvercraigs, Loch Fyne, in about 12 fathoms, 
nullipore and sand. Mr. Robertson has a specimen from 
St. Ninian’s Bay, Bute ; and Mr. Norman has obtained it in 
shell sand from Lamlash Bay. This is the most northern 
locality on record for this rare shell, but I suspect that all 
the Clyde specimens were dead, and may have been washed 
out of some glacial bed. 
British distribution —Entirely southern. It is on record 
from the Channel Islands, the northern coasts of Devon and 
Cornwall, Weymouth, Margate; also from Bantry Bay and 
Arran Islands, in Ireland. 
Foreign localities—Sweden (Malm), dead shells only ; 
Western France (Cailliaud), Northern and Southern Spain 
(M‘Andrew), and throughout the Mediterranean. 
* Rissoa reticulata, Montagu. 
Turbo reticulatus, Montagu ; Cingula Beanii, Hanley ; 
Rissoa Beanii, Forbes and Hanley. 
Habitat—Dead shells are common in the Coralline zone 
throughout most of the district, but living specimens are 
very scarce. I have only noted three live individuals from 
off “The Hawk,” Little Cumbrae; and Silvercraigs, Loch 
Fyne. Mr. Robertson records it as common off Cumbrae 
and Bute; most of his specimens, however, are dead shells. 
Mr. Norman finds it at Lamlash Bay, but very rare in a 
living state. 
British distribution.— Throughout our western and 
northern seas; said to be not uncommon. — It is probably 
more at home on our northern coasts than elsewhere. 
Foreign localities—Norway and Sweden (Lovén and 
others), Holland (Malm), Atlantic coasts of France and 
Spain (Andrew), the Mediterranean, Adriatic, and Aigean 
(Forbes). 
Rissoa punctura, Montagu. 
Turbo punctura, Montagu ; Rissoa approxima, Brown. 
Habitat——Dead shells are very common in the Coralline 
zone, but it is rather a scarce species in a living state. I 
