PLATE 23 



EXPLANATION OF FIGURES 



(C. curtipennis) 



178a, 178b Stage j. Complete set of chromosomes from a late prophase. 

 Compare each chromosome with those of figure 155. The four parts of each are 

 apparent. 



179 Stage k. Lateral view of metaphase similar to figures 157 and 158. The 

 tetrad no. 2 is lacking from the section. No. 1 is a rod; no. 4, a V; no. 5, a V; 

 no. 6, a two-knotted ring; nos. 7 and 8, similar to no. 8 of figure 157; no. 9, a ring; 

 no. 10, similar to no. 10 of figures 157 and 158; no. 11, a four-knobbed ring similar 

 to no. 11 of figures 157 and 158. 



180a, 180b Stage k. A similar stage, all chromosomes present obtained 

 from two sections. Note constrictions at x, x in 180b. 



181 Stage I. E-shaped figures resulting in the separation of the members 

 of the 7-11 and 8-10 pairs in the first maturation division. The no. 7 compon- 

 ents, shorter than the no. 11 components, separate before the longer companions 

 (no. 11) do. The same is true for chromosome 5-9. 



182a, 182b, Stage k, 182c Stage /. Stages in the separation of the chromo- 

 somes 7-11 from their mates in the 7-11 multiple during the first spermatocyte 

 division. 



183a (stage k) and 183b Similar stages in the 8-10 multiple. 



324 



