Although it was generally believed that Angoni bulls (Central African Zebu) would not serve the artificial vagina, a total of 229 ejaculates were collected from ten bulls during a 6-week period. Four ejaculates were collected each week, two after 4 days' rest and two after 3 days' rest following a limited teasing procedure. Ejaculate volume was significantly higher in the first than in the second ejaculates and higher after 4 than after 3 days' rest. The percentage of progessively motile

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... ozoa in the ejaculates did not differ significantly. Over 70% of the ejaculated spermatozoa were morphologically normal. The mean total number of spermatozoa/ ejaculate and sperm output/week averaged 5\ m=. \ 6\ m=x\ 109 and 22\m=.\6\m=x\109, respectively.