"The number of species is twelve. Several of them are found on our coasts. The Pholas genus is without colour, but the reticulations in some species are exceedingly delicate. Pholas candida ([Plate 2]) is found on the shores of Kent; you will be pleased with the shells. Pholas dactylus is larger and coarser, and not at all uncommon.
"We have now finished our first division, and must proceed to the bivalves."
Second Division.—Bivalves: 14 genera.
"I fear," said Charles, "that this new division will be rather difficult, for my father tells me that we must pay particular attention to the hinges of bivalve shells."
"Then apply yourself to the study of hinges, Charles, and your difficulties will chiefly disappear," answered Mr. Elliot.
MYA.