I. —The placentation of hyrax capensis

Abstract

The following account of the placentation of Hyrax is based on the examination of fifteen uteri that were obtained for the late Dr. Richard Assheton, Sc. D., F. R. S., by Mr. N. C. Thursby-Pelham and Mr. F. S. Delves Broughton in Nyasaland. Owing to pressure of work, Dr. Assheton was unable to make more than a cursory examination of one specimen. My results are necessarily very incomplete owing to the wide gaps between the different stages and the absence of any very early specimens. I am indebted to Mrs. Richard Assheton for her kind permission to use the material, and also to Prof. J. Stanley Gardiner, F. R. S., the late Prof. MacAllister, F. R. S., and Prof. J. T. Wilson, F. R. S., for allotting me a grant from the Cambridge University Embryological Lectureship Fund. I wish to express my thanks for their unfailing assistance in providing me with every facility for carrying out the investigations. My thanks are also due to Prof. J. P. Hill, F. R. S., for his invaluable advice and assistance in the interpretation of the specimens, and for allowing me to examine the specimens procured by Mr. G. B. Haddon in the West Mali district of Northern Uganda and presented to University College by Dr. G. D. Hale Carpenter, of the Uganda Medical Service. Dr. G. S. Sansom, of University College, London, also gave me much help with sections and photographs. The completion of the work was rendered possible by the kindness of the Ministry of Agriculture and Fisheries in according me special leave for the purpose.