See also article: Sherborn’s Index Animalium: New names, systematic errors and availability of names in the light of modern nomenclature / Francisco Welter-Schultes, Angela Gorlich, Alexandra Lutze [website 1]
The Index Animalium, which ran to almost 9600 pages, has been scanned and made available through the 'Smithsonian Libraries' website [website 2]
A-B -- C -- D, E, F, G -- H, I, J, K, L -- M, N -- O, P, Q, R -- S-Z -- Epilogue, additions to bibliography, additions and corrections, and index to trivialia.