Research Items

Abstract

Some Interesting Radulæ YOSHIO KONDO, in his paper "The Dentition of Six Syncerid Genera Gasteropoda, Prosobranchiata, Synceridæ: (Assimineidæ)"(Occasional Papers Bernice P. Bishop Museum, Honolulu, Hawaii, 18, No. 23; 1944) describes the radular teeth of certain land shells described by C. Montague Cooke, jun. and William J. Clench ("Land Shells (Synceridæ) from the Southern Western Pacific", Occasional Papers Bernice P. Bishop Museum, 17, No. 20; 1943). Electrina succinea (Sowerby) and Rapanella andersoni Cooke and Clench were both found in the small island of Rapa but in distinct areas of distribution. The genus Garretia is limited to Cook Islands, the radula of G. biangulata (Pease) being dealt with here, Fijianella calciphila Cooke and Clench comes from Lau Islands, Quadrasiella mucronata Moellendorff from Guam, Marianne Islands. All these have a very peculiar operculum characteristic of each species and differ much in form of shell. The type of radula is found to be remarkably uniform for all six. There are no lateral processes, and the teeth themselves are peculiar and distinctive in form.