EFFECT OF DIPLOID ON HAPLOID MYCELIA 257 



at another place was set down a fragment of an (aB) mycelium, 

 while at the third place was set down a fragment of an (^6) myce- 

 lium and a fragment of an (aB) mycelium side by side and close 

 together. The two fragments of mycelia {Ab) and (aB) lying close 

 together, after beginning to grow, quickly came into contact with 

 one another and thus built up the illegitimate diploid mycelium 

 {Ab)-{-{aB) on the plate. The two fragments of mycelium (Ab) 

 used for inoculating the mycelium (AB) were taken out of one and 

 the same plate at one and the same time ; and a similar procedure 

 was followed for the two fragments of the mycelium (aB). The 

 chances of error in comparing the effect on the large haploid myce- 

 lium (AB) of the illegitimate diploid mycelium {Ab)-\-{aB) with 

 the effect of the two illegitimate haploid mycelia (Ab) and (aB) 

 was thus reduced to a minimum. 



The nature of all the twenty-four combinations and the results 

 which they gave are set forth in Tables VII, VIII, and IX. 



Table VII. 



Legitimate Combinations : the Effect produced on a Large Haploid 

 Mycelium by a Small Haploid or Diploid Inoculum. 



The results embodied in Table VII indicate that, in the eight 

 legitimate combinations, the small haploid or diploid inoculum 



VOL. IV. 



