Referee's report by Ernest William MacBride, on a paper 'Studies in dedifferentiation I - Dedifferentiation in Echinus larvae, and it's relation to metamorphosis' by Julian Sorell Huxley Sectional Committee: Zoology Not recommended for publication in the 'Proceedings of the Royal Society of London'. The investigation is interesting and opens up new lines of study, but the observations have little relation to the theories and contain no new information. Suggests the author continue his investigations into Echinus larvae and stages of metamorphosis. [Not published] Endorsed on verso as received 9 June 1921. [June 1921]