A New Type of Mammalian Intersexuality

IN 1922, while investigating the fauna of the New Hebrides under the Percy Sladen Trust, I found that many of the domestic pigs (Suspapuensis Less, and Garn.) kept by the natives were intersexual. These monstrosities had previously been noticed by anthropologists (Codrington, 1891). I dissected one of them and found that it differed from the great majority of the intersex pigs and goats occasionally found in Great Britain in the complete absence of uterus and vagina. Returning to the New Hebrides in 1927, again under the Percy Sladen Trust, 1 made a much more thorough investigation of these pigs, of which this paper is the outcome. I dissected eight more specimens, and in none of them was there the smallest rudiment of uterus or vagina. I also investigated the natives' account of the genetics of the abnormality. I wish to thank the Trustees of the Percy Sladen Memorial Fund and Mrs G. E. Baker and Mr S. J. Baker for providing part of the funds for my investigation of the fauna of the New Hebrides. I wish also to thank Prof. E. S. Goodrich for allowing me the leave of absence which has made my visits to the New Hebrides possible.