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There appears to be no plasmosome in either class of spermatogonia.

In safranin-gentian preparations it stains, not like a plasmosome, but red like the heterochromosomes, while the spireme is violet.

First spermatocyte, spireme stage, showing the larger and smaller heterochromosome associated with a plasmosome. 65-68.

Heterochromosome group. p = plasmosome, l = large heterochromosome, s = small heterochromosome. 24-27.

First spermatocyte from same testis, spireme stage, showing 2 small chromosomes associated with 1 large one and a plasmosome.