366 ORILLA STOTLER WERNER. 



PLATE 7. 



FIGS. 37 to 42. Chromosomes from the amnion of females artificially ar- 

 ranged according to size. W, \v indicates chromosomes carrying female-tendency 

 genes only. 382 indicates the chromosomes carrying sex-linked factors and sup- 

 posedly a preponderance of male-tendency genes. 



FIG. 37. Chromosomes from a prophase shown at Fig. 8. Autosomes 32 are 

 here crescent-shaped. 



FIG. 38. Chromosomes from a late prophase shown at Fig. 9. 



FIG. 39. Chromosomes from a prophase shown at Fig. 13. 



FIG. 40. Chromosomes from a prophase shown at Fig. n. 



FIG. 41. Chromosomes from a prophase shown at Fig. 12. 



FIG. 42. Chromosomes from a prophase shown at Fig. 16. 



