Referee's report by Edwin Ray Lankester, on three papers; 'On the structure and functions of the eyes of arthropoda' by B Thompson Lowne, 'Observations on the colouring-matters of the so-called bile of invertebrates, on those of the bile of vertebrates, and on some unusual urine pigments' by Charles A MacMunn and 'On the ciliated groove (siphonoglyphe) in the stomodaeum of the alcyonarians' by Sydney John Hickson He is not able to comment on Lowne's paper, but will soon. MacMunns's paper is not recommended for publication in Philosophical Transactions, but should be published in Proceedings. Hickson's paper is recommended for publication in Philosophical Transactions. Subject: Physiology ['On the structure and functions of the eyes of arthropoda' and 'Observations on the colouring-matters of the so-called bile of invertebrates, on those of the bile of vertebrates, and on some unusual urine pigments' published in Proceedings of the Royal Society, 1883]. ['On the ciliated groove (siphonoglyphe) in the stomodaeum of the alcyonarians' published in Philosophical Transactions, 1883]. 31 May 1883