Paris, Georges Chamerot, 1881. 8vo (25.0 x 16.2 cm). 79 pp.; one large, triple-folded, tinted map, one very large, multi-folded and hand-coloured profile from Chott Rharsa to the Mediterranean coast, five lithographed plates with shells. Original printed front wrapper in near contemporary wrappers.

The first part was written by the French engineer and hydrologist Victor Edmond Léon Dru (1837-1904); the second part by the malacologist and palaeontologist Ernest Charles Philippe Auguste Munier-Chalmas (1843-1903). The malacofauna described consists of well-preserved shells of Mesozoic age. Many species were described as new. Chott Rharsa (now Shatt al Gharsah, or Chott el Gharsa) "...is [a] sedimentary basin and intermittent salt lake in Tunisia. It has width of 20 kilometres and length of 50 kilometres. At 17 metres under sea level, it is at the lowest point of the country" (Wikipedia). Uncut. The protective wrappers are a reversed cover (blank versos outside) of an unrelated work by Jules Rostaing. Original front wrapper a bit chipped at edges. Otherwise, a very good, clean copy.