No. 629] DAEWIX AND IIYBBIDIZATIOK 553 



volves, based, liowevcr, upon Darwin's tlieory of paii- 

 i>'enesis, whereby eaeli cell was supposed to throw off 

 " f?emmules" which carried tlie characters to tlie re])ro- 

 ductive cells. lie says: 



Darwin tlien assumes that in the hybrid tiiere exist 

 two kinds of ''gennnules" or cliaracter-carriers ; viz., 

 ])Hre .iionnnnies from each of the two parent forms, and 

 com billed or liybridized gemmules as well, and proceeds 

 ill the fo!h)wini»' statement, to ^?ive about as clear an ac- 

 count as we hn\-e to-day. of the cause for the reappear- 



The latter statcnieiit i- \ irtnally a >tatement of the con- 

 dition of llilim- in hctcrozy-o-ls. in principle as we have 

 it to-day. if wc a->uni(" the ' ' hyl)ridi/.(Ml " o-emmules to 

 represent the -Di." r(.inhination. \\v ha\e the necessary 

 substitution. 



Darwin's theory wa> a iiat iiral corroMa ry to his doctrine 



