4370. A MANUAL OF THE LAND AND FRESH-WATER SHELLS OF The British Islands, WITH FIGURES OF EACH OF THE KINDS. BY WILLIAM TURTON, M.D. = A New Edition, THOROUGHLY REVISED AND MUCH ENLARGED, BY JOHN EDWARD GRAY, F.R.S., &c. LONDON:.. PRINTED FOR LONGMAN, ORME, BROWN, GREEN, AND LONGMANS, PATERNOSTER-ROW. |