List of papers passed for publication in the Proceedings R G Edwards, 'The experimental induction of gynogenesis in the mouse. I. Irradiation of the sperm by x-rays'. Communicated by C H Waddington FRS. J Del Castillo and B Katz, FRS, 'A study of curare action with an electrical micro-method'. J Del Castillo and B Katz, FRS, 'The identity of 'intrinsic' and 'extrinsic' acetylcholine receptors in the motor end-plate'. J Del Castillo and B Katz, FRS, 'A comparison of acetylcholine and stable depolarizing agents'. J Del Castillo and B Katz, FRS, 'Interaction at end-plate receptors between different choline derivatives'. E G Gray, 'The spindle and extrafusal innervation of a frog muscle'. Communicated by J Z Young, FRS. R G Edwards, 'The experimental induction of gynogenesis in the mouse. II. Irradiation of the sperm by ultra-violet'. Communicated by C H Waddington, FRS. R Halliday and R A Kekwick, 'Electrophoretic analysis of the sera of young rats'. Communicated by F W R Brambell, FRS. p68. 28 November 1956