On another occasion _Telephone_ ♀ (another impure green) × _Buchsbaum_ gave four _yellow smooth and_ two _green wrinkled_, but one [? both: the grammar is obscure] of the greens did not germinate[89]. [89] Professor Weldon should have alluded to this. _Dead_ seeds have no bearing on these questions, seeing that their characters may be pathological. The same seeds are later described as “_wie Telephone selbst_,” so, apart from the possibility of death, they may also have been self-fertilised. (3 _b_) _Telephone cases._ _Telephone_, crossed with at least one yellow variety (_Auvergne_) gave all or some green or greenish. These I have no doubt are good cases of “defective dominance” of yellow. But it must be noted that _Telephone is an impure green_. Nominally a green, it is as Professor Weldon has satisfied himself, very irregular in colour, having many intermediates shading to pure yellow and many piebalds. It is the variety from which alone Professor Weldon made his colour-scale. _I desire therefore to call special attention to the fact that Telephone, though not a pure green, Tschermak’s sample being as he says “gelblichweiss grün,” a yellowish-white-green in cotyledon-colour, is the variety which has so far contributed the clearest evidence of the green colour dominating in its crosses with a yellow_; and that _Buchsbaum_ is probably a similar case. To this point we shall return. It may not be superfluous to mention also that one cross between _Fillbasket_ (a thorough _green_) and _Telephone_ gave three _yellowish_ green seeds (Tschermak, (36), p. 501). (3 _c_) _Couturier cases._ This fully yellow variety in crosses with two fully green sorts gave seeds either yellow or greenish yellow. In one case _Fillbasket_ ♀ fertilised by _Couturier_ gave mixed seeds, green and yellow. For any evidence to the contrary, the green in this case may have been self-fertilised. Nevertheless, taking the evidence together, I think it is most likely that _Couturier_ is a genuine case of imperfect dominance of yellow. If so, it is the only true “exception” in crosses between stable forms. * * * * * We have now narrowed down Professor Weldon’s exceptions to dominance of cotyledon-colour to two varieties, one yellow (_Couturier_), and one yellow “tending to green” (_Buchsbaum_), which show imperfect dominance of yellow; and one variety, _Telephone_, an impure and irregular green, which shows occasional but uncertain dominance of _green_. What may be the meaning of the phenomenon shown by the unstable or mosaic varieties we cannot tell; but I venture to suggest that when we more fully appreciate the nature and genesis of the gametes, it will be found that the peculiarities of heredity seen in these cases have more in common with those of “false hybridism” (see p. 34) than with any true failure of dominance.