In such a case we call the character _A_ a _compound_ allelomorph, and we can speak of the integral characters which constitute it as _hypallelomorphs_. We ought to write the heterozygote (_A A′ A″_ ...) _B_ and the gametes produced by it may be of the form _A_, _A′_, _A″_, _A‴_,... _B_. Or the resolution may be incomplete in various degrees, as we already suspect from certain instances; in which case we may have gametes _A_, _A′ A″_, _A‴ A″″_, _A′ A″ A^v_,... _B_, and so on. Each of these may meet a similar or a dissimilar gamete in fertilisation, forming either a homozygote, or a heterozygote with its distinct properties. In the case of compound allelomorphs we know as yet nothing of the statistical relations of the several gametes. Thus we have the conception (5) _of a Compound character_, borne by one gamete, transmitted entire as a single character so long as fertilisation only occurs between like gametes, or is, in other words, “symmetrical,” but if fertilisation take place with a dissimilar gamete (or possibly by other causes), resolved into integral constituent characters, each separately transmissible. Next, as, by the union of the gametes bearing the various hypallelomorphs with other such gametes, or with gametes bearing simple allelomorphs, in fertilisation, a number of new zygotes will be formed, such as may not have been seen before in the breed: these will inevitably be spoken of as _varieties_; and it is difficult not to extend the idea of variation to them. To distinguish these from other variations--which there must surely be--we may call them (6) _Analytical_ variations in contradistinction to (7) _Synthetical_ variations, occurring not by the separation of pre-existing constituent-characters but by the addition of new characters. Lastly, it is impossible to be presented with the fact that in Mendelian cases the cross-bred produces on an average _equal_ numbers of gametes of each kind, that is to say, a symmetrical result, without suspecting that this fact must correspond with some symmetrical figure of distribution of those gametes in the cell-divisions by which they are produced. * * * * * At the present time these are the main conceptions--though by no means all--arising directly from Mendel’s work. The first six are all more or less clearly embodied by him, though not in every case developed in accordance with modern knowledge. The seventh is not a Mendelian conception, but the facts before us justify its inclusion in the above list though for the present it is little more than a mere surmise. * * * * *