Referee's report by Arthur Keith, on a paper 'A comparative study of the endocranial cast of Sinanthropus' by Joseph L Shellshear and Grafton Elliot Smith Sectional Committee: Zoology Recommended for publication in the 'Philosophical Transactions of the Royal Society'. References to illustrations require attention. All the illustrations should be included. [Published in the Philosophical Transactions of the Royal Society B, 1934] Endorsed on verso as received 19 January 1934. [January 1934]