62 DESCRIPTION OF PLATES. 



Plate IX. 

 Chelymorfha argus {Family Chrysomelidce). 



Figs. 34-35. Equatorial plates from egg follicles, n equal pairs, no small chromosome. 



36. Equatorial plate of spermatogonium, 21 large chromosomes, 1 small one. 



37. First spermatocyte, synizesis stage. 

 38-40. First spermatocyte, synapsis stage. 



41-43. First spermatocyte, bouquet stage after synapsis. 



44-45. First spermatocyte, spireme stage showing the unequal pair of hetero- 

 chromosomes. 

 46. First spermatocyte, prophase. 

 47-49. First spermatocyte, metaphase. 

 50-51. First spermatocyte, equatorial plates, x the heterochromosome pair. 



52. First spermatocyte, showing metakinesis of the unequal pair. 



53. First spermatocyte, anaphase. 



54-55. Second spermatocyte, equatorial plates. 



56. Second spermatocyte, anaphase. 



Odontota dor salts (Family Chrysomelidce) . 



57. Equatorial plate of male somatic cell from walls of the testis, 15 large 



chromosomes, 1 small one. 

 58-59. Equatorial plates of spermatogonia, 15 large chromosomes, 1 small one. 



60. Resting nucleus of spermatogonium, showing plasmosome (p). 



61. First spermatocyte, synizesis stage. 



62. First spermatocyte, synapsis stage. 



63-64. First spermatocyte, spireme stage, showing the larger and smaller hete- 

 rochromosome associated with a plasmosome. 

 65-68. First spermatocyte, prophases. 



