VULGARIS L. AND IN PH ‘MULTIFLORUS WILLD. 127 
there are 17, without K1 (IV and V) 5 individuals; with BI. (I, ID) 12, 
without Bl (III) 5 plants; with L (I, IV) 6, without L (II, III, V) 16 
individuals. With regard to Kl and Bl the segregations come very 
near the monohybrid 3: 1-proportion; those for the L-factor are 
here also very deviating from the expected proportion. The crypto- 
meric state of the L-factor in those types, that do not possess the 
Bl-factor, is here the probable cause. But besides the deviation in 
types I and II is highly remarkable; here the cause may perhaps 
been found in a possible coupling or repulsion between one of 
the factors L or Bl and the K!-factor. The cultures of this year 
will probably give certainty about this problematic factorial relation. 
10. Cross oF BRUINE X ZWARTE. 
Only one F;-plant of this hybrid was available; its seedcoats 
were intense black. The Fo-family segregated very simply into three 
groups: I black (39 individuals), II reddish-brown (phaenotypically 
identical with the F, of cross 4, Citroen X Rotjes ; 6 individuals) 
and III yellowish brown, as the common yellow-brown race „Bruine” 
(3 plants). The hybrid did not segregate further than the yellow- 
brown type; it may thus be concluded, that the G-factor was present 
in both parents. Besides this one, the black parent seems to have 
possessed the L-factor and a factor Z, that is responsible for the 
black colouring. The hybrid has been GG LI Zz and segregates thus 
into 7.GUZ, 3GiZ,.3GLz and LG Iz; giving so 12 blacks: 3 
reddish-brown: 1 yellow-brown, and this is in good accordance 
with the numbers observed: 

Type I | IT III Total Remark 
: | || Among the 39 blackseeded indivi- 
Bees Obzetzed OUT SEES, 4° duals there were4,that had besides 
16 black, also reddish-brown beans; 
Expected numbers. 361 9 | 3 48 | their classification in type I may thus 
be doubtful. 
w 
Li 
Theoretical proportions | 12 | 







11. Cross OF KIEVITS X ZWARTE. 
In a culture of the Kievits-race, one spontaneous hybrid was found 
with blackmarbled pattern upon a greyish white groundcolour. The F5- 
generation of this hybrid consisted of 53 individuals, all coloured, so 
that the supposition: the unknown father was a white bean, may be con- 
