ANOMIA, OSTREA. 3 
to 40 fathoms, and probably to all depths, on stones, shells, 
and seaweeds. It is plentiful throughout the district, but 
seldom fine. The varieties are endless; and the principal 
ones (squamula, aculeata, and cylindrica) are all common. 
British distribution.— Universally distributed, and gener- 
ally common throughout the British Islands; Alder, how- 
ever, reports it as “not common” on the Northumberland 
and Durham coasts. Unusually fine specimens are obtained 
at Loch Ryan. 
Foreign localities—Iceland (Verkriizen), Norway (Sais, 
and others), Spain and Portugal (UW‘Andrew), Gibraltar 
Bay (W. Brown), Mediterranean, various collectors; Madeira 
(M‘A ndrew), Massachusetts (Gould), Canada (Packard, and 
others). It is commonly believed, and confirmed by 
M‘Andrew, that the animal of this species is poisonous; but 
Lister states that he has eaten it, adding that it is held in 
esteem at Bordeaux (T'res Tractatus, p. 182). 
* Anomia patelliformis, Lanne. 
Ostreum striatum, Da Costa ; Anomia undulata, Montagu. 
Habitat.—In 10 to 40 fathoms, on hard ground; the finest 
specimens being obtained from the insides of dead bivalves. 
It seems generally distributed over the district, but not 
plentiful. My best specimens were taken at Bogany and 
Toward Points. The variety striata is said by Mr. Norman 
to be abundant in the Clyde district. 
British distribution—Every where, on suitable ground, in 
company with A. ephippium ; but it does not extend to the 
shore, or even to shallow water, as is the case with that species. 
Foreign localities—Norway and Sweden (Sars, Lovén, 
and others), Vigo (M‘Andrew), Mediterranean (Nares, and 
others). It does not appear to be on record from north- 
eastern America, but is reported (doubtfully) from the North 
Pacific (P. P. Carpenter). 
FAMILY OsTREID, Broderip. 
OstrEA, Linné. 
* Ostrea edulis, Linné. 
Ostreum vulgare, Lister. 
Habitat.—Gregarious in 1 to 3 fathoms. Small beds exist 
at the following stations :—Campbeltown Loch—south side, 
off the Battery ; north side, off the Plantation; Loch Fyne, 
