﻿AbstractMultivariate approaches to morphological study of shell form have rarely been applied to cowries (Gastropoda:Cypraeidae) with preference, instead, for comparing formulaic notations of shell form that report averages (i.e., means) for key morphometrics such as shell dimensions, their ratios, and counts of apertural teeth. Although widely applied, the “shell formula” does not account for variation among individuals or support statistical comparison between taxa. This study applied a multivariate approach to analyse shell form within the four accepted subspecies of the cowrie,Umbiliaarmeniaca(Verco, 1912) and included a previously unstudied, and most northerly, population ofU.armeniacafrom Lancelin, Western Australia. Multivariate analyses readily separated the recognised subspecies ofU.armeniaca(U.a.armeniaca,U.a.diprotodon,U.a.clarksoniandU.a.andreyi), but did not separate the Lancelin population fromU.a.andreyi, indicating that the former represents a northward extension ofU.a.andreyithat is not morphometrically distinguishable. These results provide improved understanding of infraspecific differences in shell form ofU.armeniacaacross its broad distribution, and demonstrate the utility of multivariate morphometric methods for statistical comparison of shell form between taxa. This approach is complimentary to existing research practices and has broad potential application in future morphometric studies of both extant and fossil taxa within the familyCypraeidae.