PLATE 15 



Shows meiosis in the following : 



(a) D. cristata. 1st diakinesis. n = 82 pairs (X 1,000). 



(b) D. X uliginosa. 1st metaphase. n = 39 pairs + 86 singles (X 1,000). See explanatory Fig. 4. 



(c) Hybrid D. dilatata X spinulosa. 1st metaphase. n = 33 pairs -|- 98 singles. (X 1,000). See 

 explanatory Fig. 5. 



(d) Hybrid " D. dilatata" (Bavaria). 1st diakinesis, early, n 3S pairs | 47 singles (X 1.000). See 

 explanatory Fig. 6. 



