Connolly 1941. South Arabian non-marine mollusca. Sec. I.-The British Museum Expedition to South-West Arabia, pp.18-35 . Sec. II.-The Lord Wakefield Expedition to the Hadhramaut, 1938, pp. 36-40. Exped South-West Arabia 1937-38 London, 1(4) 1941: pp. 17-41