232 



MONTGOMERY — A STUDY OF THE CHROMOSOMES 



Brochymena sp., Figs. ^G-^'J. 



Fig. 40. Spermatogonio nucleus, rest stage. 

 Fig. 47. Pole view of spermatogone monaster. 



Plate II. 



Brochymena sp., Figs. 48, 49. 



Fig. 4.8. Nucleus of first, spermatocyte, telaphase, 



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



I'erillus confluent, Figs. 50-53. 



Fig. 50. Spermatogonio nucleus, rest stage. 



Fig 51. Spermatogonio monaster, pole view. 



Fig. 52. Nucleus of first spermatocyte, rest stage. 



Pig. 58. Pole view of monaster, first maturation mitosis. 



Cxnus delius, Figs. 54-83 



Fig. 54 Spermatogonio 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. 63. Pole view of monaster, first, maturation mitosis. 



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



Fig. 64. 

 Fig. 65. 



Fig. 66. 

 Fig. 67. 

 Fig. 68. 

 Fig. 69. 



Fig. 70. 

 Fig. 71. 



Trichop&pla wmivittata, Figs. €4 89. 



Spermatogonia nucleus, rest, stage. 



Spermatogonic monaster, pole view. 



Nucleus of first, spermatocyte, synapsis. 



N Helens of first, spermatocyte, rest, .singe. 



Pole view of monaster, first maturation mitosis. 



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



Eurygaster alternatus, Figs. 70, 71. 



Nucleus of first spermatocyte, rest, stage. 



Pole view of monaster, first maturation mitosis. 



Anasa Iris/is, 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. 



Anasa armigera, Figs. 77, 78. 



Fig. 77. Spermatogonic monaster, pole view. 



Fig. 78. Pole view of the spindle of the first maturation division, {he chromatin elements not, yet definitely ;ir 

 ranged in 1 he plane of the equator. 



