During a study on the effects of nodulectomy on onchocerciasis in a village in the Liberian rain-forest 400 Onchocerca-nodules were excised from 34 inhabitants. Analysis of the nodules revealed a worm burden of 718 complete live male and 1062 complete live female worms as well as 9 male and 117 female worms which were mostly calcified and degenerating. Seventy three percent of the live females contained developing embryos or released microfilariae, the other females either contained eggs or showed empty uteri. Some observations were made on degenerating worms. The male:female sex ratio was 1:1.5 and possible reasons for this are discussed.