100 THE MOLLUSCA OF THE FIRTH OF CLYDE. 
Poreign localities—Iceland (Torell and Verkriizen), Nor- 
way (Loven, and others), Kiel Bay (Meyer and Mobius), 
Madeira (M‘Andivew—one specimen), Greenland (M/déller), 
St. Lawrence (Whiteaves), Massachusetts (Gould). 
AcERA, Miiller. 
Acera bullata, Miiller. 
Akera bullata, Miller; Bulla akera, Gmelin; Bulla Nor- 
wegica, Bruguwiére; Bulla resiliens, Donovan; Akera 
flexilis, Brown. 
Habitat—A single specimen on the shore at Farland 
Point, Cumbrae; dead, but with the remains of the animal 
adhering. It has been taken in Lamlash Bay by Mr. Norman, 
who records it as scarce. Its proper zone is the sub-littoral 
or Laminarian. 
British distribution.—Throughout our seas; very abun- 
dant in many muddy estuaries in the south of England, but 
much scarcer in the north. It extends to our Ultima Thule 
—Unst—and to the opposite extreme in the Scilly and 
Channel Islands. 
Foreign localities—From Norway (Sars, Lovén, and 
others) to Northern Spain (M‘Andrew), as well as in the 
Mediterranean, Adriatic, and Aigean Seas. 
ActT£0N, De Montfort. 
* Acteon tornatilis, Linné. 
Voluta tornatilis, Linné ; Turbo ovalis, Da Costa ; Torna- 
tella fasciata, Lamarck, id. Forbes and Hanley. 
Habitat—Scarce, but widely distributed in the district. 
I have taken it living in Kamesburgh Bay and off Ardbeg 
and Bogany Points, Bute, in 8 to 15 fathoms, in gravelly and 
muddy sand—dead specimens off Toward Point, Tan Spit, 
and Ardrishaig. Mr. Norman has taken it sparingly off 
Cumbrae and in Lamlash Bay. 
British distribution—Throughout all our seas from low 
water mark to considerable depths, and generally not un- 
common. 
Foreign localities—From Iceland (Verkriizen) and Nor- 
way (Lovén, and others) to Spain, Portugal, and Mogador 
(M‘Andrew), and throughout the Mediterranean as far as 
the Aigean (Lorbes). 
