PLATE 6 
EXPLANATION OF FIGURES 
45 The large cell near the upper central edge of the photograph is a stage 
in middle diplotene, showing the disjunction of the homologous chromosomes 
in the shape of fine threads. The threads, it will be observed, are united at 
their ends. Several pachytene nuclei are visible at the lower left-hand corner. 
In the lower right-hand corner are shown portions of three ring tetrads. 
46 Gigantic diplotene cell. This type of cell is very common; the size of the 
nuclei is remarkable in some instances. Note the split threads extending across 
the nucleus, but united at the ends by two dark staining knobs. 
47 Portion of a diplotene nucleus together with two early preleptotene nuclei . 
Note the size difference. 
48 Diplotene nucleus. 
49 Part of a diplotene nucleus, showing splitting of the threads. 
50 and 51 Large diplotene nuclei. Larva of SO mm. 
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