387 
Thus by the examination of their seeds in F 3 the constitution of 
the 72 F 2 plants for which a summary follows could be determined, 
as well as that of four of the offspring of the exceptional cross No. 
215. Twenty other plants gave too poor a crop to allow of this 
being done: — 
Mendelian Constitution of Parents. 
accuracy of the sampling. 
There are apparently three errors among the 72 cases, namely 
(a) 1 seed sown as sm. y. gave rise to am. and wr. green 
9) 1 seed'sown as sm. y. gave rise to wrinkled yellow 
M 1 2t‘ sown as wr. g. gave rise to smooth green 
,6) and (c) illustrate the fact already ^ted that smooth ami 
wrinkled seeL are not always to be distingmshed with certainty 
ity with Mendelian expectation. 
