1. Bechyné, Jan.: Universidad Central de Venezuela, Maracay, Venezuela (Personal communications 1967, 1968, 1969).
2. Blackman, M. W.: Spermatogenesis of the myriapods. Notes on the spermatocytes and spermatids of Scolopendra L. Kansas Univ. Quart. 10, 61?78 (1901).
3. ?: The spermatogenesis of myriapods. III. The spermatogenesis in Scolopendra heros. Bull. Mus. Comp. Zool. Harvard Univ. 48, 1?137 (1905a).
4. ?: The spermatogenesis of myriapods. IV. On the karyosphere and nucleolus in the spermatocytes of Scolopendra subspinipes. Proc. Amer. Acad. Arts Sci. 41, 329?344 (1905b).
5. ?: The spermatogenesis of myriapods. V. On the spermatocytes of Lithobius. Proc. Amer. Arts. Sci. 42, 487?518 (1907).