ABSTRACT In a paper published in this Journal in 1886 (2) I described the generative organs and the peculiar protandrous hermaphroditism of Myxine. That description included a brief and incomplete account of the spermatogenesis, of which I had not been able, for want of leisure and material, to make a more deliberate investigation. In 1888, Dr. Fridtjof Nansen, then Zoological Curator at the Bergen Museum, published in the ‘Aarsberetning/ or Annual Report of that Institution, the results of a study of the reproductive organs of the animal in question (3). Dr. Nansen’s researches were, as he himself states, suggested to him by my paper, and in a great many important matters he fully confirms my results. But with regard to the development of the spermatozoa he contradicts and rejects with perhaps unnecessary emphasis all my statements, and comes to the conclusion that I never saw the normal spermatozoa at all.