This multiauthored publication is a compendium of the results of the International Workshop on Systematics and Biogeography of Cephalopods. The contributions cover the general systematics and biogeography of the majority of the ecologically, economically, and biomedically important families of cephalopods. The work begins with a series of contributions on the analysis of systematic characters, a necessary activity in the study of the systematics of any group. This is followed by the largest section, consisting of the systematic and biogeographic treatments of seven cephalopod families: Sepiidae, Loliginidae, Enoploteuthidae, Onychoteuthidae, Histioteuthidae, Ommastrephidae, and Octopodidae. These families were chosen for study based on a combination of their relative importance and the need for improved systematic knowledge. The work concludes with a summary of the current classification, type localities, and type repositories of the Recent Cephalopoda. The workshop organizers intend these volumes to serve as a companion to Smithsonian Contributions to Zoology, number 513, 1992.