376 K. MASUI: 
Figs. 32, 33. Polar views of metaphase plates of first division, showing eighteen chromosomes, 
Fig. 31. Polar view of metaphase of first division, showing 16 chromosomes. 
Figs. 35, 36. Polar views of metaphase plates, of first division, showing nineteen chromosomes. 
Figs. 37, 38, 39, 43. Lateral views of first division, showing the accessory chromosome. 
Figs. 40—42. Side views of first division; long axis of chromosomes is at right angle to 
that of spindle. 
Figs. 44. 45. Lateral views of anaphases of first division. 
PLATE XI. 
Fig. 46. Telophase of first division. 
Figs. 47—50. Secondary spermatocytes in resting stage, showing chromatoid corpuscle, 
mitochondria and chromatiu nucleolus. 
Fig 51. Resting secondary spermatocyte and metaphase plate of second division. 
Figs. 52—54. Polar views of metaphase plates of second division. 
Fig. 55, Side view of metaphase plate of second division. 
Fig. 56. Side view of metaphase plate of second division, showing mitochondria. 
Fig. 57. Anaphase of second division, showing chromatoid corpuscle. 
Figs. 58, 59. Telophases of second division. 
Figs. 60, 62. Spermatids, showing mitochondrial granules. 
Figs. 61, 63, 64, 65. Spermatids, showing chromatoid corpuscle and centrosome. 
Fig. 66. A spermatid, showing archoplasm. 
Fig. 67. A spermatid, showing centrosomes. 
Fig. 69. A spermatid, showing mitochondria. 
Figs. 68, 70, 71, 72, 73. Development of Spermatozoa. 
Figs. 74, 75. Mature spermatozoa, 
