Eight species and one subspecies of two genera of Collignoniceratinae, Collignoniceras and Prionocyclus, are analysed with respect to standard morphological distance measures and ribfrequencies, methods of multivariate statistical analysis, including canonical variate ordination, principal components and generalized distances. It was found that the biostratigraphically inferred evolutionary sequence, as currently perceived, is upheld in detail for the Collignoniceras data. The 'nearest -neigh...