The "slider" used at Edgartown differs from the "scraper" by having perfectly straight arms and no curved bowl, the blade being fastened to the arms in a hook-and-eye fashion. The dimensions of this dredge are the same as those of the "scraper," although occasionally smaller dredges are found. (4) _The "Roller" Dredge._--This style of dredge is used only in the town of Mattapoisett, where the scallopers claim it is the most successful. The dredge is suitable for scalloping over rough ground, as the blade of the dredge is merely a line of leads, which roll over the surface of the ground gathering in the scallops. The dredge consists of an oval iron frame, 32 by 20 inches, which acts as the arms, and is attached to another iron frame, 32 by 3 inches. The blade of the dredge consists of a thin rope with attached leads. The net is made wholly of twine, and is about 2½ feet long. _Scalloping with Power Boats._--The season of 1907 has witnessed in Massachusetts the first use of auxiliary power in the scallop fishery. At Edgartown the main part of the scalloping is now done by power, which, in spite of the additional expense of 5 gallons of gasolene per day, gives a proportionately larger catch of scallops. The Edgartown scallopers claim that their daily catch, using power, is from one-third to one-half better than under the old method of dredging by sail. Not only can they scallop when the wind is too light or too heavy for successful scalloping by sail, but more "drifts" can be made in the same time. A slight disadvantage of scalloping with power is the necessity of having two men, as the steering of the power boat demands much closer attention than the sail boat, which is practically held to a fixed course by the dredges. A power boat for scalloping possesses only the disadvantage of additional cost; but it is only necessary to look forward a few years, when expedition rather than cheapness will be in demand, to a partial revolution in the present methods of scalloping, whereby the auxiliary cat boat will take the place of the sail boat in the scallop fishery. II. _Preparing the Scallop for Market._ (1) _The "Eye."_--The edible part of the scallop is the large adductor muscle. The rest of the animal is thrown away, though in certain localities it is used as fish bait and in others for fertilizer. Why the whole of the animal is not eaten is hard to say. Undoubtedly all is good, but popular prejudice, which molds opinion, has decreed that it is bad, so it is not used as food. This is perhaps due to the highly pigmented and colored portions of the animal. Nevertheless, there is a decided possibility that in the future we shall eat the entire scallop, as well as the luscious adductor muscle. The adductor muscle is called by the dealers and fishermen the "eye," a name given perhaps from its important position in the animal, and its appearance. The color of the "eye," which has a cylindrical form, is a yellowish white.