76 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
(MAndrew). Mr. Jeffreys and many others record it from 
the Mediterranean. 
Odostomia interstincta, Montagu. 
Turbo interstinctus, Montagu; Turbo canaliculatus, Adams ; 
Rissoa Deshayesiana, Récluz. 
Habitat.— From 8 fathoms downward, amongst dead 
shells, sand and nullipore ; rather common in a living state 
throughout the district. Dead shells are abundant on the 
Tan Spit, Cumbrae. Mr. Norman has taken it alive in rock 
pools between tide marks. 
British distribution.—Nearly everywhere on our coasts 
from a little below the verge of low water downward. 
Foreign localities—Throughout the Atlantic coasts from 
Norway to the Canary Islands, and in the Mediterranean, 
Adriatic, and Aigean Seas. 
* Odostomia spiralis, Vontagu. 
Turbo spiralis, Montagu ; Voluta pellucida, Dillwyn. 
Habitat.—Living with the preceding, and equally common 
on the coasts of Bute and Cumbrae, and generally through- 
out the district Mr. Norman has taken it alive in rock 
pools at Cumbrae. 
British distribution—With the preceding species, in 
the Laminarian and Coralline zones; a common shell. 
Foreign localities—From Norway (Saz's and others) to 
Sweden, Denmark, France, Spain, Portugal, and as far as 
Gibraltar Andrew). The Adriatic is also given in Brit. 
Con. Supp. 
Odostomia fenestrata, Forbes. 
Chemnitzia fenestrata, Forbes and Hanley. 
Habitat—I have seen one specimen in Mr. Robertson's 
cabinet, taken off Kilchattan Bay, Bute. This appears to 
be the most northern locality on record, and the specimen 
is probably unique from our Firth. 
British distribution.—Entirely southern—the localities 
given in Brit. Con. are Dartmouth, Southampton, Eyemouth, 
Torbay, Fowey, Falmouth, and Jersey. 
Foreign localities.—French Atlantic coast (Cadlliaud and 
others), Northern Spain (M‘Andrew), Spezzia (Jeffreys), 
Algiers (Weimkauff). 
