37O ORILLA STOTLER WERNER. 



PLATE 9. 



FIGS. 49 to 54. Chromosomes from first spermatocytes from smear prepara- 

 tions. The Z bivalent chromosome is numbered 38Z. The autosomal bivalents 

 from 37 to i. All the cells are in the prophase stage. 



FIG. 49. Chromosomes from cell shown at Fig. 24. 



FIG. 50. Chromosomes from cell shown at Fig. 27. 



FIG. 51. Chromosomes from a cell shown at Fig. 29. 



FIG. 52. Chromosomes from a cell shown at Fig. 25. 



FIG. 53. Chromosomes from a cell shown at Fig. 28. 



FIG. 54. Chromosomes from a cell shown at Fig. 26. 



