Philadelphia, PA, the author, 1866. 8vo (21.1 x 13.7 cm). 159, xliii pp.; 18 lithographed plates in double suite: hand coloured, and uncoloured, sepia-tinted (for a total of 36 plates). Later olive buckram. Gilt bands and title on the spine.

The very rare double-suite edition of the first major work exclusively on the land snails and slugs of North America. Written by the American malacologist George Washington Tryon (1838-1888) and with fine illustrations by E. J. Nolan. Some species from brackish environments (Ellobiidae, Truncatellidae) are included. Provenance: stamp of the American malacologist Richard Irwin Johnson (1925-2020) in the top margin of the front free endpaper recto and title. This is a rare work as such. We found only one auction record - in 1985 - of a medium copy (not in double-suite). A very good, clean copy. Nissen ZBI, 4173.