Referee's report by John Gray McKendrick, on a paper 'On the constitution and mode of formation of "food vacuoles" in infusoria, as illustrated by the history of the processes of digestion in Carchesium polypinum' by Major Greenwood Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The abstract printed in the Proceedings cannot be fully appreciated without the plates. Subject: Physiology [Published in the Philosophical Transactions of the Royal Society, 1894] 28 December 1893