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THE OVARY OF ROCK HYRAX OF THE GENUS PROCAVIA

Summary.: Investigations of the reproductive tracts of thirty-five female Procavia collected in the Kenya Rift Valley over a 1-year period are reported. The seasonal nature of breeding in these populations is confirmed. Parturition is followed by a period of lactation anoestrus. The appearance and internal structure of the ovary is described, together with an account of oogenesis and follicular development. Follicle and oocyte are large at the end of the first phase of growth, possibly due to the accumulation of lipid droplets in the oocyte. There was a high incidence of transuterine migration of ova in these animals. Considerable atresia of tertiary follicles during early pregnancy was noted. The ovary of Procavia shows general similarities to that of Dendrohyrax.