Referee's report by George Busk, on a paper 'On the anatomy and physiology of the nematoids, parasitic and free; with observations on their zoological position and affinities to the echinoderms' by Henry Charlton Bastian Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The paper covers a little researched subject, and builds upon earlier work by the author. In addendum, refers to a paper by John Whitaker Hulke. Subject: Mathematics, Physics and Chemistry [Published in the Philosophical Transactions of the Royal Society] 23 April 1866