The Land Mollusca of the Treasury Islands, Solomon Islands

IN THE COURSE of war service in the Solomon Islands the writer was stationed on Stirling Island in the Treasuries from December 10, 1943, ro January 13, 1944. A collection of land snails was made and subsequently this was supplemented by a collection made on Mono Island at about the same time by Me. N. Gardner. Smith (1885) recorded a number of species collected by _Guppy from the group, but since that time little has been _added. A great deal of scattered work has been published on the land snails of the Solomons but few faunal lists have been prepared for any specific island or group. The writer has recently (Dell, 1955) given an account of the land snails of an island in the northern Solomons (Nissan) and the present account presents another step towards a fuller understanding of the zoogeography of the Solomon Islands. The Treasury Group consists of two main islands, Mono and Stirling. Mono is a compound volcanic and coral deposit island some five and one half by nine miles in extent rising to 1,150 feet. Stirling, slightly to the south, is an elevated barrier reef with a comparatively flat surface rising to no more than 71 feet (Guppy, 1887). Most of the surface of both islands was clothed in thick tropical vegetation. The following account is not complete as the exigencies of military service did not