Studies in Spermatogenesis (Part 2 of 2)

by N. M. Stevens

223. Second spermatocytes, equatorial plates.

Elater I (Family Elateridæ, species not determined).

224. Equatorial plate of spermatogonium, 19 chromosomes, x the odd one.

225. First spermatocyte, spireme stage, x the odd chromosome.

226. First spermatocyte, metaphase.

227. First spermatocyte, prophase.

228. First spermatocyte, equatorial plate.

229. Equatorial plate from egg follicle, 20 chromosomes, x₁ and x₂ the pair corresponding to x in the spermatogonium.

Elater II (Species not determined).

230. Equatorial plate of spermatogonium, 19 chromosomes, x the odd one.