The same story of over-fishing and improvidence extends round our whole coast. The far-famed Pandores obtained at Preston Pans, near Edinburgh, once so cheap, are becoming scarce and dear. The brood is caught and barreled for export to Holland and other places, especially the Thames oyster farms. English buyers pick the grown oysters for Manchester and other large provincial markets, and the Corporation of Edinburgh, the Duke of Buccleuch, and other proprietors of the foreshore, have just interfered in time to prevent the total destruction of the trade, when the wild song of the Cockenzie dredgerman might have been left to charm some future antiquary, as it is now said to charm the oyster into the dredge with its refrain: "The herring it loves the merry moonlight, The mackerel it loves the wind; But the oyster it loves the dredger's song, For it comes of a gentle kind." The Scallop-shell (_Pecten_) is round, nearly equal-sided, resting on the right valve, which is more convex and marked with radiating ribs. Linnæus made the mistake of confounding with the _Ostrea_ a great number of shells, which, by their channeled edges and surfaces, strongly reminded one of the arrangements of the teeth of a comb, whence their name of _Pecten_. They were well known to naturalists long before the time of Linnæus, under the name of _Pilgrims'_ shells, a name which came into use from the practice which prevailed among pilgrims in the middle ages--we know not why--of ornamenting habits and hats with the valves of some of the species.