Referee's report by Alan Sterling Parkes, on a paper 'The effects of prolonged œstriol administration upon the sex skin of macaca mulatta' by Carl Bachman, James Bertram Collip and Hans Selye Sectional committee: Physiology Recommended for publication in Proceedings, in full. Some of the terms used throughout the paper could be changed. The cricket metaphor used is 'unfortunate' as 'batsman do not usually wear vizors or padded cuffs!'. If the authors are referring to Canadian cricket, they should confirm this. [Published in Proceedings of the Royal Society B, 1935]. Endorsed on verso as received 12 October 1934. October 1934