Referee's report by Cecil Clifford Dobell, on a paper 'On the bicoecidae: a family of colourless flagellates' by L E R Picken Sectional committee: Zoology Recommended for publication in Philosophical Transactions. The author had contacted him previously and he provided suggestions for improvement. The author has applied these all to the paper and it is suitable for publication. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in Philosophical Transactions B, 1941]. Endorsed on verso as received 20 September 1940. 18 September 1940