Meioiic Nuclear Divisions of Gallonia candicans. 757 
Fig* 53 * Further preparation for second contraction. The univalent portions uniting to form 
the bivalent strands. 
Fig. 54. The segments are going into second contraction. 
PLATE LXII. 
Fig- 55- Second contraction. Those segments which are escaping show the separation of the 
two univalent chromosomes. 
Fig. 56. Loosening of the second contraction. The loops exhibit longitudinal fission. A small 
pair of chromosomes have already separated from the contraction. 
Fig. 57. The eight pairs of univalent chromosomes are seen to be splitting apart as they come 
out of second contraction. 
Figs. 58 a and 58 b. Two sections through the same nucleus. In Fig. 58 A the segments are 
still in masses, whilst in Fig. 58 b they have begun to split apart into the univalent chromosomes. 
Figs. 59 A and 59 B. Sections through the same nucleus, showing the splitting of the bivalent 
limbs. The eight pairs of chromosomes can be identified. 
Fig. 60. Slightly later stage, in which the chromosomes are becoming more concentrated. Note 
the longitudinal fission in the separate univalent chromosomes. 
Fig. 61. Shows a looped bivalent chromosome, of which one side is concentrated, whilst the 
other is still in a beaded condition. 
Fig. 62. Later stage in the concentration of the chromosomes. 
Fig. 63. Nucleus with its chromosomes joined end to end like the links of a chain. 
Fig. 64. Diakinesis. The nucleolus has fragmented. 
Fig. 65. Chromosomes going on to the equatorial plate. 
Fig. 66. Polar view of an equatorial plate. 
Fig. 67. Chromosomes passing to the poles. 
PLATE LXIII. 
Fig. 68. Anaphase of the heterotype division. Each chromosome is split. 
Fig. 69. Polar view of anaphase, showing the eight split chromosomes. 
Fig. 70. Telophase in which the chromosomes have formed themselves into an indistinguishable 
mass and the alveolization is commencing. 
Fig. 71. Polar view of a nucleus in telophase, showing breaking up of the chromosomes and 
the origin of the paired threads and parallelisms. 
Fig. 72. Telophase of first meiotic division. 
Fig- 73 - Further fragmentation of the chromosomes in the telophase. The remains of the 
spindle fibres are still visible. 
Fig. 74. Homotype prophase, showing a reconcentration of the linin portions. 
Fig. 75. The two nuclei elongate, and spindle fibres make their appearance. The nuclear 
contents become more and more concentrated to form the chromosome segments. 
Fig. 76. Polar view of a nucleus in the same stage as Fig. 75. 
Fig. 77. Further concentration of the segments to form the chromosomes. 
Fig. 78. Long loop-like chromosomes going on to the spindle. 
Fig. 79. Equatorial plate of homotype division. 
Fig. 80. The chromosomes are moving off to the poles. 
Fig. 81. Diaster of homotype division. 
Fig. 82. Telophase of tetrad nucleus, showing the breaking up of the chromosomes into parallel 
masses. 
Fig- 83. 1 Resting ’ nucleus of the future pollen grain. The chromatin contents are in the form 
of granules, and parallelism is still visible. 
