Printed proof, 'Preliminary note on the transplantation and growth of mammalian ova within a uterine foster-mother' by Walter Heape Heape writes: 'In this preliminary note I wish merely to record an experiment by which it is shown that it is possible to make use of the uterus of one variety of rabbit as a medium for the growth and complete foetal development of fertilised ova of another variety of rabbit. Briefly, the experiment made was as follows:—On the 27th April, 1890, two ova were obtained from an Angora doe rabbit which had been fertilised by an Angora buck thirty-two hours previously; the ova were undergoing segmentation, being divided into four segments.' Annotations in pencil and ink. Subject: Embryology Received 12 November 1890. Read 27 November 1890. Communicated by Michael Foster. A version of this paper was published in volume 48 of the Proceedings of the Royal Society as 'Preliminary note on the transplantation and growth of mammalian ova within a uterine foster-mother'. 1890