Referee's Report by J [James] Gray on a paper 'The comparative behaviour of mammalian eggs in vivo and in vitro. II. The development of fertilized and artificially activated rabbit eggs' by G [George] Pincus Paper reference code: B.43 If the paper's conclusions are sound then it is certainly of interest, however the referee believes it is unconvincing. 'I do not think that the Society should publish the paper without additional evidence'. Detailed criticisms are provided in an attached typescript report. [Not published]. Received 6 December 1938 [December 1938]