Persistence of Sperms to a Later Mating in Gammarus

Abstract

MRS. SEXTON'S recent criticism¹ of my views on the above subject gives me an opportunity of citing further evidence in their favour. So far as I can see, only three explanations of the appearance of the anomalous black-eyed individual (for particulars see my previous note²) are possible: that a reverse mutation had occurred, that the individual had been accidentally introduced owing to careless technique, and the one advanced at the time (fertilisation of a single egg by sperm persisting from a previous mating).