The Philippine land shells of the genus Amphidromus / The shipworms of the Philippine Islands / The Philippine land mollusks of the genus Opisthoporus / The Philippine land mollusks Cochlostyla rufogaster and Obba marmorata and their races / The land shells of the genus Obba from Mindoro province Phlippine Islands / The tree snails of the genus Cochlostyla of Mindoro Province Philippine Islands.

1917-1938 Six papers in one. 278 p. [47, 22, 5, 14, 29, 161], 69 plates and maps, including one in full colour, 8vo (22.3 x 15.0 cm), green buckram with gilt title "Biology of Philippines. Land Shells". Original printed covers bound in. Last paper with punch holes in the left margin (hardly visible). From the library of the American malacologist Richard Irwin Johnson (1925-2020) with his stamp on the first paper.Important contributions to the knowledge of the distribution and speciation in several groups of Philippine land shells. Bartsch included descriptions of new species and subspecies, as well as distribution maps. Some papers belong to the scarcest titles in the series United States Museum Bulletin. This is all that has been written by Paul Bartsch on Philippine molluscs. The rather short but well-illustrated paper on shipworms is the only one on marine species.