The present volume on marine lobsters includes 149 species in 3 in fraorders, 10 families and 33 genera. There is an introductory section that supplies general remarks on the biology and fisheries of lobsters, a glossary of technical terms, illustrated keys to infraorders, superfamilies, families, subfamilies and species, and detailed accounts on species. Species accounts include illustrations of the species and their distributions, and information on scientific and vernacular names, types, distribution, habitat, biology, size, interest to fisheries, and relevant literature. Following the species accounts is a table of species by major fishing area, an index, and a bibliography. Two original contributions to nomenclature are presented in this volume. A new subgenus, Sagmariasus, is erected under the palinurid genus Jasus. In addition, the new name, Callianassa biffari, is proposed to replace the junior primary homonym C. affinis Holmes, 1900.