Plate IX.
Chelymortha argus (Family Chrysomelidæ).
Figs. 34-35. Equatorial plates from egg follicles, 11 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 heterochromosomes.
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 dorsalis (Family Chrysomelidæ).
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 heterochromosome associated with a plasmosome.
65-68. First spermatocyte, prophases.
