148 A Defence of Mendel's 



to this residuum of exceptions, one would wish to learn 

 the subsequent fate of these aberrant seeds and how their 

 offspring differed from that of their sisters. One only of 

 them can I yet trace, viz. the green seed from Telephone ? 

 x Biichsbaum <, which proved a veritable "green dominant." 

 As for the remainder, Tschermak promises in his first 

 paper to watch them. But in his second paper the only 

 passage I can find relating to them declares that perhaps 

 some of the questionable cases he mentioned in his first 

 paper "are attributable to similar isolated anomalies in 

 dominance; some proved themselves by subsequent cultivation 

 to be cases of accidental self -fertilisation ; others failed to 

 germinate* " I may warn those interested in these ques- 

 tions, that in estimating changes due to ripening, dead 

 seeds are not available. 



B. Seed-coats and shapes. 



1. Seed-coats. Professor Weldon lays some stress on 

 the results obtained by Correnst in crossing a pea having 

 green cotyledons and a thin almost colourless coat (grune 

 spate Erfurter Folger-erbse) with two purple-flowered 

 varieties. The latter are what are known in England 

 as "grey' : peas, though the term grey is not generally 

 appropriate. 



In these varieties the cotyledon-colour is yellow and 



* "Vielleicht sind einige der I.e. 507 bis 508 erwdlmten fragile hen 

 Fdlle auf dhnliche vereinzelte Anomalien der Merkmalswerthigkeit 

 zu beziehen ; einige enviesen sich allerdings beim Anbaii als Producte 

 ungewollter Selbstbefruchtung, andere keimten nicht." 



f Kegarding this case I have to thank Professor Correns for a 

 good deal of information which he kindly sent me in response to my 

 inquiry. I am thus able to supplement the published account in 

 isome particulars. 



