9. 



^ 



«{^ le, \ 



Fig. 6 (2500 i). 

 a: V. arvensis (population T, table I) from Tunø: homotypic meta- 



p has is in a pollen-niother cell. 17 chromosomes. 

 b: V. tricolor (population X, table I) from Selvig, Samsø: diakinesis in a 



poUen-mother cell: 13 chromosomes. 



/ 



► ••• 



f / 



\ 



•Vi 



«• 



.««• 



X 



J 



/*^ 



/ 



t^3. 



^&^ 



. ^é^ 



/ 



e 



y 



y 



»: 



X 



" \ 



m 



^/•t 



\ 



CH 



h 



Fig. 7 (25oo/i). 



a-g: Reduction division in a spontaneous hybrid pai-v, lut. (V. 246 — 14). 



a: homotj-pic metaphasis: 13 chromos. 



b: heterotypic metaphasis: 14 chromos. 



c: homotypic metaphasis: 15 chromos. 

 d-g: early heterotypic anaphases seen from the pole; varying number 

 of chromosomes. 



h: early heterotypic anaphasis in artifical hybrid parv, lut (Fi). 



Botanisk Tidsskrift. 37. Bind. 



25 



