Micromolluscs of the family Rissoidae and belonging to the genus Alvania s.l. from the Canary Islands and the Madeira archipelago are revised. For several species the type locality is restricted and lectotypes are designated for Rissoa canadensis d’Orbigny, 1839, R. euchila Watson, 1886, R. aurantiaca Watson, 1873, R. leacocki Watson, 1873,and R. macandrewi Manzoni, 1868. Two species ( Alvania guancha n.sp. and A. piersmai n.sp.) are new to science.