E. R.  Trueman, ?The structure of the ligament of the Semelidae?, Proceedings of the Malacological Society of London, vol. 29, pp. 30-36, 1951.

H.  J. Macpherson and Chapple, E. H., ?A systematic list of the marine and estuarine Mollusca of Victoria?, Memoirs of the National Museum of Victoria, Melbourne, vol. 17, pp. 107-185, 1951.

W.  Kegel, ?Diskordanz der Schalen bei Pectiniden und Pteriiden?, Abhandlungen der Senckenbergische naturforschende Gesellschaft, vol. 485, pp. 81-86, 1951.

J.  Hornell, Indian molluscs. Bombay, India: Bombay Natural History Society, 1951, p. iv+96.

S.  Hirase and Taki, I., A handbook of illustrated shells in natural colors from Japanese Islands and their adjacent territories, Revised and enlarged edition of "A collection of Japanese shells". Tokyo: Bunky?kaku, 1951, p. xxiv+134.

K. H.  Barnard, A beginner's guide to South African shells. Cape Town: Maskew Miller, 1951, p. 215.

S.  Hirase and Taki, I., A handbook of illustrated shells in natural colors from Japanese Islands and their adjacent territories. Tokyo: Bunky?kaku, 1951, p. xxiv+134.

J.  Hornell, Indian molluscs. Bombay, India: Bombay Natural History Society, 1951, p. iv+96.

W.  Kegel, ?Diskordanz der Schalen bei Pectiniden und Pteriiden?, Abhandlungen der Senckenbergische naturforschende Gesellschaft, vol. 485, pp. 81-86, 1951.

H.  J. Macpherson and Chapple, E. H., ?A systematic list of the marine and estuarine Mollusca of Victoria?, Memoirs of the National Museum of Victoria, Melbourne, vol. 17, pp. 107-185, 1951.