A monograph of the order of Oligochaeta - Beddard, Frank E. (Frank Evers), 1858 -1925 (Clarendon Press, 1895)

A monograph of the recent Cephalopoda based on the collections in the British Museum (Natural History) - Robson, G. C. (Guy Coburn), 1888 -1945 (1932)

A monograph on the Polychaeta of Southern Africa - Day, J. H. (British Museum (Natural History), 1967)

A monograph on the Polychaeta of southern Africa - Day, J. H. (BM(NH), 1967)