The New Zealand Cellana strigilis complex has been traditionally divided into six subspecies. Recent molecular investigations, however, revealed that the complex comprises two clades. In this paper, an additional morphometric analysis on 160 shells from the two clades confirms the need for taxonomic reconsideration of the C. strigilis complex. Here, two species are recognised in the Cellana strigilis group, a western species, C. strigilis (Hombron & Jacquinot, 1841), from South, Stewart, Snares, Auckland and Campbell islands, with Patella redimiculum Reeve, 1854 and C. strigilis flemingi Powell, 1955 as synonyms; and an eastern species, C. oliveri Powell, 1955, from Chatham, Bounty Islands and Antipodes Islands, with C. strigilis bollonsi Powell, 1955 and C. chathamensis of authors (not Pilsbry, 1891) as synonyms. Acmaea chathamensis Pilsbry, 1891 is based on mislocalised foreign shells, probably C. rota (Gmelin, 1791) from the Red Sea. A neotype is designated for P. strigilis Hombron & Jacquinot, 1841, lectotypes are designated for P. redimiculum Reeve, 1854 and A. chathamensis Pilsbry, 1891, and a type locality is selected for P. redimiculum.