THE SYSTEMATIC POSITION OF LAROCHEA FINLAY, 1927, AND INTRODUCTION OFA NEW GENUS AND 2 NEW SPECIES (GASTROPODA, SCISSURELLIDAE)

Species of the gastropod genus Larochea Finlay, 1927 are shown to be s cissurellids without an anal shell slit or foramen. The New Zealand sp ecies, L. miranda Finlay, 1927 and L. secunda Powell, 1937, brood thei r young in the right subpallial cavity against a modified inner lip th at is set well behind the apertural plane. Larochea scitula n.sp. is b ased on shells from Wanganella Bank, southern Norfolk Ridge. Larocheop sis n.gen. is introduced for a minute species from off northern New Ze aland that lacks a shell brood chamber. Larochea miranda and Larocheop sis amplexa n.sp. are either gonochoristic with smaller males or conse cutive hermaphrodites, while Larochea secunda and L. scitula are evide ntly gonochoristic, having mature males and females of similar size.