P. miniaceus.

P. pusio.

P. hybridus.

P. sulphureus.

P. lividus.

P. glaber. The glabrous Scallop. Pl. [15], fig. 4.

Species of which the two valves are ribbed and almost equally convex, the right a little less, and having its inferior ear less broad than the left, so as to produce a kind of groove for the passage of the byssus.

P. Jacobæus. The scallop of St. James.

Species very inequivalve; the left valve being very flat, the right convex; ears equal.

P. pleuronectes. The sole Scallop.