FOR THE MENDELIAN Laws 661 
Now since such is shown to be the case in pure races of ani- 
mals, I suggest that the sex cells of fertile animal hybrids are 
formed in a similar way, and thus we may have in animals a cyto- 
logical basis for variation in accord with the Mendelian conception. 
And I further suggest that this is the case in plants as well. This 
notion is, I am well aware, squarely opposed to the present con- 
ception of the nature of the maturation mitoses in plants, but I 
submit (1) That the optical effect in the dividing sex nucle would 
be the same in either case, and (2) That closer study of the early 
stages in the spermatogenesis of plants would give a result entirely 
analogous to the results drawn from analogous morphological 
studies of animals. 
NEW YorK BOTANICAL GARDEN. 
