Referee's report by Ronald Aylmer Fisher, on a paper 'The adaptive significance of heterokaryosis in wild pencillium' by J L Jinks Sectional committee: Physiology Paper reference code: B8 Fisher remarks the paper is good, and if the work had been done in his own department he would have recommended a specialised journal for publication. If the paper is published in the Proceedings he suggests 'more general introductory remarks on the biology and reproduction of the genus' are needed. [Published in Proceedings B, 1952]. Date received not given. 13 February 1952