PLATE 2 
EXPLANATION OF FIGURES 
23 Accessory and unequal tetrad forming a hexad multiple; k, remains of 
vesicle, smaller dyad attached to accessory. 
24 The same; larger dyad attached to both ends of U-shaped accessory. 
25 The same; all three small tetrads adhering to accessory. 
26 Late prophase, Arphia simplex; unequal tetrad separate from accessory. 
27. First spermatocyte metaphase; (this and most of the remaining figures are 
designed to show the distribution of the unequal tetrads in relation to the acces- 
sory). 
28 Late prophase of entire first spermatocyte complex: at this time there are 
eleven separate elements; drawn from three sections. 
29 Unequal tetrad with persistent vesicle, k, still distinguishable at first sper- 
matocyte metaphase. 
30 First spermatocyte metaphase from same animal as figure 39. Note that 
in the first instance the larger and in the last the smaller dyad accompanies the 
accessory. 
31 and 32 Entire first spermatocyte complexes: 31 drawn from two sections, 
32 from three. 
33 and 34. Early anaphases of entire eomplexes. In figure 33 the smaller dyad 
accompanies the accessory while in figure 34 it is the larger one. Both drawn from 
two sections. 
35 Entire complex of Arphia simplex except accessory. Note that there are 
only two small tetrads here corresponding to the four small chromosomes of the 
spermatogonial group; figures 5 and 6. Also note the general differences between 
the complexes of the two genera by comparing with figures 31 and 382. 
36 ©First spermatocyte metaphase from same animal as figure 382. 
37 and 388 First spermatocyte metaphases from another animal. 
39 and 40 The same from a different animal. 
41 and 42 Anaphases from still another animal illustrating the same feature. 
43 and 44 From same animal as figures 39 and 40. 
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