We eagerly filled our pockets with the smooth round pebbles which in some places, even here, were thinly sprinkled over the sand, together with flat circular shells (_Scutellæ?_); but, as we had read, when they were dry they had lost their beauty, and at each sitting we emptied our pockets again of the least remarkable, until our collection was well culled. Every material was rolled into the pebble form by the waves; not only stones of various kinds, but the hard coal which some vessel had dropped, bits of glass, and in one instance a mass of peat three feet long, where there was nothing like it to be seen for many miles. All the great rivers of the globe are annually, if not constantly, discharging great quantities of lumber, which drifts to distant shores. I have also seen very perfect pebbles of brick, and bars of Castile soap from a wreck rolled into perfect cylinders, and still spirally streaked with red, like a barber’s pole. When a cargo of rags is washed ashore, every old pocket and bag-like recess will be filled to bursting with sand by being rolled on the beach; and on one occasion, the pockets in the clothing of the wrecked being thus puffed up, even after they had been ripped open by wreckers, deluded me into the hope of identifying them by the contents. A pair of gloves looked exactly as if filled by a hand. The water in such clothing is soon wrung out and evaporated, but the sand, which works itself into every seam, is not so easily got rid of. Sponges, which are picked up on the shore, as is well known, retain some of the sand of the beach to the latest day, in spite of every effort to extract it. I found one stone on the top of the bank, of a dark gray color, shaped exactly like a giant clam (_Mactra solidissima_), and of the same size; and, what was more remarkable, one-half of the outside had shelled off and lay near it, of the same form and depth with one of the valves of this clam, while the other half was loose, leaving a solid core of a darker color within it. I afterward saw a stone resembling a razor clam, but it was a solid one. It appeared as if the stone, in the process of formation, had filled the mould which a clam-shell furnished; or the same law that shaped the clam had made a clam of stone. Dead clams, with shells full of sand, are called sand clams. There were many of the large clamshells filled with sand; and sometimes one valve was separately filled exactly even, as if it had been heaped and then scraped. Even among the many small stones on the top of the bank, I found one arrow-head. Beside the giant clam and barnacles, we found on the shore a small clam (_Mesodesma arctata_), which I dug with my hands in numbers on the bars, and which is sometimes eaten by the inhabitants, in the absence of the _Mya arenaria_, on this side. Most of their empty shells had been perforated by some foe.—Also, the _Astarte castanea_.