The taxonomic configuration of the Order Primates in three different schemes (morphological, immunological, and cladistic) is examined. Multivariate techniques of analysis are used to testthe taxonomies, one against the others, resulting in a quantitative comparison. The analysis reveals both the similarities and differences among the taxonomies, resulting ultimately in a composite classification of the Order Primates. The composite taxonomy is a quantitatively meaningful and qualitatively interpretable result.