Work found, with species-group names introduced therein:
Maton, W. G. 1797. Observations relative chiefly to the natural history, picturesque scenery, and antiquities, of the western counties of England, made in the years 1794 and 1796. Observations Relative Chiefly to the Natural History...of the Western Counties of England 1 xi + 336 pp., 8 pls. Turbo rudis, see Littorina saxatilis (Olivi, 1792)