This volume is a comprehensive, fully illustrated Catalogue of the Deep-sea Batoids and Chimaeras of the Indian Ocean, encompassing FAO Fishing Areas 51 and 57, and that portion of Area 47 off South Africa from about 18degrees 42'E to 30degress 00'E. The present volume includes 4 orders, 10 families, 28 genera, and 78 species of batoid and chimaera-like fishes occurring in the Indian Ocean Deep-sea. The Catalogue includes a section on standard measurements for batoids and chimaeras with associated terms. It provides accounts for all orders, families, and genera and all keys to taxa are fully illustrated. A species representative of each genus is also provided and includes: valid modern names and original citation of the species; synonyms; the English, French, and Spanish FAO names for the species; a lateral view and often other useful illustrations; field marks; diagnostic features; distribution, including a GIS map; habitat; biology; size; interest to fisheries and human impact; local names when available; a remarks sections; and literature