Figure 12.

(Table IV.) Idem [(the same as above)], in which [condensed spermatids] of the old generation are positioned along the tubule axis. [Round spermatids] of the young generation move from the first [(round)] to the second [(elongating)] developmental stage. Second stage [type B differentiated spermatogonia] gradually become first stage [preleptotene spermatocytes], and second stage [early pachytene spermatocytes] enter their third stage [(late pachytene)]. 480/1. (This represents a stage VII–VIII tubule [Perey, Clermont, and Leblond Amer J Anat (1961)]. Germ cells included would be: rare type A spermatogonial stem cells, type A undifferentiated spermatogonia, preleptotene spermatocytes, pachytene spermatocytes, round and early elongating spermatids, and condensed spermatids.)