I N D E X 11. 
12 Lettered Ark, or Cockle. 
13 Spotted Ark. 
O I S T E R. 
1 Common Englijh S c a l l o p. 
2 The Mediterranean S c a L l 0 p. 
7 Ducal Mantlco 
9 Royal Mantle, 
10 Ducks-Foot. 
