N. M. STEVENS. 



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32 



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30 



33 



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34 



FIG. 23. Theobaldia incidens, oogonial prophase. 



FIGS. 24-26. Chromosomes of the spermatogonia. 



FIG. 27. Spermatogonial prophase. 



FIG. 28. Synizesis stage. 



FIGS. 29 and 30. First spermatocyte growth stages. 



FIGS. 31 and 32. First spermatocyte prophase and metaphase. 



FIGS. 33 and 34. Second spermatocyte prophase. 



