AVICULID^. SEA-WING. 
139 
To stew Periwinkles. ~~C\e2in. them and wash them 
from the sand in three or four waters, boil them and 
pick them out of their shells. To a pint of fish put 
half a pint of fish-stock, two ounces of butter, and some 
pepper and salt; add a spoonful of flour, stirred in 
gradually, and simmer over a slow fire until it is a pro- 
per thickness ; add a large spoonful of essence of an- 
chovy, and one of mushroom sauce.* 
Fam. AVICULIDiE. 
P/iViVA.— SEA-WING. 
Pinna pectinata, Linnaeus. Sea-wing . — Shell wedge- 
shaped, gaping at one end and tapering to a point at the 
other, equivalve, horn-colour ; hinge toothless, straight, 
and long ; ligament linear, strong and elastic, and in- 
ternal, sometimes smooth and at others with delicate 
ribs which radiate from the beaks, which are straight and 
pointed. 
The Pinna is the largest of our British bivalves, and 
specimens are found twelve inches long and seven broad 
at the gaping end. Many pairs of this shell were found 
in the spring of 1862 on the beach at Dawlish, some of 
them with the fish still alive in them ; but they were all 
small, the size of the one figured. Other localities men- 
tioned by Forbes and Hanley are Salcomb Bay (where 
a bed of these shells was discovered by Montagu), 
Weymouth, and all the Dorset coast, Milford Haven, the 
Hebrides, Zetland, and in Ireland off* the coasts of Lon- 
donderry, Antrim, Down, etc. ; and at Youghal, where 
they are known by the name of “ powder-horns,^^ the 
* Murray’s ‘ Modern Cookery Book.’ , 
