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A History of the County of Somerset
… Vertigo substriata is a mistaken identification of Miller's record of Turbo sexdentatus which is Vertigo antivertigo, … are those by the Rev. Canon A. Merle Norman, D.C.L., F.R.S., 1 and by Mr. E. W. Swanton. 2 A. GASTROPODA I. PULMONATA … of Weston-super-Mare. One was taken on the north bank of the Avon near Clifton, and several are said to have …