OBSERVATIONS ON SPERMATOGENESIS IN ONCHOCERCA VOLVULUS AND WUCHERERIA BANCROFTI

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Abstract
Serial sections of onchocercomata revealed that in O. volvulus during spermatogenesis the spermatocyte divides twice to give rise to four spermatids. The spermatid develops into an elongate, narrow, smooth-walled spermatozoan, which, upon entering the female genital tract, becomes rounded and probably amoeboid. The chromosomes are distinct throughout all stages of spermatogenesis and remain separate and distinct in the spermatids and both phases of the spermatozoa. The haploid numher of chromosomes in this species is believed to be five. In W. bancrofti the material, although incomplete, indicated the cellular changes in spermatogenesis to be similar to that seen in O. volvulus. Here the chromosomes were more clearly visualized and the haploid number was consistently found to number five.

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