Referee's report by Hans Friedrich Gadow, on a paper 'The circulatory system of the common grass snake, Tropidonotus natrix' by Charles Henry O'Donoghue Sectional Committee: Zoology Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The paper does not advance any new observations. This species has not been monographed previously, but other species of the same genus have been. [Not published] Endorsed on verso as received 8 March 1912. [March 1912]