Book

Gray, J.E. 1840a. A Manual of the Land and Fresh-Water Shells of The British Islands, with figures of each of the kinds. by W. Turton. A New Edition, thoroughly revised and much enlarged. Longman, Orme, Brown, Green, and Longmans, London, [Mar-Jun] 1840: [i]-ix, errata, [1]-324, pls. I-XII. ≡

New: Subsequent spelling

New: Subsequent publication