Stuttgart, E. Schweizerbart (Erwin Nägele), 1937. Large 4to (29.2 x 22.4 cm). 144 pp.; nine heliographic plates, seven text figures, five folding plates with line drawings. Burgundy leatherette. Spine with black morocco label with gilt title.

A very detailed study with several new species, written by the German palaeontologist Thea Prieser. The fine plates show generally well-preserved specimens. This is an offprint from Palaeontographica, volume 86. Little is known about the author; she is not mentioned in 2400 years of malacology. Title page mounted. A very good, clean, and decently bound copy.