This account is based on 28 samples of Oegopsida collected with the Indian Ocean standard net, during the International Indian Ocean Expedition. With a few exceptions, most of the specimens are in larval stages. Out of 34 specimens discriminated, 10 are so young or in defective condition to be identified specifically. The remaining 24 specimens are identified to species or at least generic level. All except two species, belong to a single family, Cranchiidae. Species with records of occurrence and remarks, if any, are included in the paper along with illustrations of some of the species.