232 MONTGOMERY A STUDY OF THE CHROMOSOMES 



Brochymoia sp., Fiyn. 40-49. 



Fig. 46. Spermatogonic nucleus, rest stage. 

 Fig. 47. Pole view of Spermatogonic monaster. 



Plate II. 



Brochymena sp., Figs. 48, 49. 



Fig. 48. Nucleus of first spcrmatocyte, telapbase. 



Fig. 49. Pole view of monaster, first maturation mitosis. 



Perilhu co/ijluens, Figs. 50-53. 



Fig. 50. Spermatogonic nucleus, rest stage. 



Fig 51. Spermatogonic monaster, pole view. 



Fig. 53. Nucleus of first spermatocyte, rest stage. 



Fig. 53. Pole view of monaster, first maturation mitosis. 



Camts delius, Figs. 54-63. 



Fig. 54 Spermatogonic nucleus, rest stage. 



Fig. 55. Spermatogonic monaster, pole view. 



Figs. 57, 58. Nuclei of first spermatocytes, rest stage. 



Figs. 59, 60. Pole views of monasters, first maturation mitosis. 



Fig. 61. Lateral view of the same stage, showing all the chromatin elements. 



Fig. 62. Pole view of monaster, first maturation mitosis. 



Fig. 63. Nucleus of first spermatocyte, rest stage, 



Trichopepla semimttata, Figs. C4-69. 



Fig. 64. Spermatogonic nucleus, rest stage. 



Fig. 65. Spermatogonic monaster, pole view. 



Fig. 66. Nucleus of first spermatocyte, synapsis. 



Fig. 67. Nucleus of first spermatocyte, rest stage. 



Fig. 68. Pole view of monaster, first maturation mitosis. 



Fig. 69. Lateral view of slightly earlier stage, showing all the chromatin elements. 



Eurygazter alternatvs, Figs. 70, 71. 



Fig. 70. Nucleus of first Bpermatocytr, rest stage. 



Fig. 71. Pole view of monaster, first maturation mitosis. 



Anata tristis, Figs. 7S-7G. 



Figs. 72, 73. Spermatogonic nuclei, rest stage. 



Fig. 74. Spermatogonic monaster, pole view. 



Fig. 75. Nucleus of first spermatocyte, telaphase 



Fig. 76. Pole view of monaster, first maturation mitosis. 



Anaia armigera, Figs. 77, 7S. 



Fig. 77. Spermatogonic monaster, pole view. 



Fig. 78. Pole view of the spindle of the first maturation division, the chromatin elements not yet definitely ar- 

 ranged in the plane of the equator. 





