St Petersburg, Kaiserliche Akademie der Wissenschaften, 1901. Large 4to (29.2 x 20.1 cm). xii, 321 pp.; 27 lithographed plates [numbered I-VIII, IXa, IXb, X-XXVI]; ten large, multi-folded plates. Later navy buckram with gilt lines and title on the spine.

A well-illustrated work, showing a large diversity of slugs, especially from the region around the Caspian Sea and the Caucasian mountains. Many species are new. This is perhaps the most important malacological contribution by the German landsnail specialist Heinrich Rudolf Simroth (1851-1917). Inscribed by Simroth on the title page, viz. a dedication to Curt von Rohrscheidt, about whom little else is known, as well as an angry remark about printing errors "auf russisches Conto", and a disharmony because of a wrong size of the plates. Map six bound after map eight; edges of title page with some repairs, otherwise a very good, clean copy. Nissen ZBI, 3854.