AVICULIDiE. — SEA-WING. 139 



To stew Periwinkles. — Clean 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. AVICULID^. 

 P/iViV^.— 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.' 



