Thiselton-Dyer. — Morphological Noles. 441 
over the stability of its parents, though it may not necessarily 
do so. In other words, the resultant of the fused parental 
characters may be as stable as their components. But when 
a species is varying, i. e. producing varieties, its stability is 
for the time lost, and there is nothing to prevent the dissocia- 
tion of the fused characters and of their constituents, or their 
recombination in every possible way. 
And I am confirmed in this opinion by the statement of 
Bateson that there is ‘ one group of cases, definite though as 
yet not numerous, where we know that the Mendelian 
principles do not apply’ (Principles of Heredity, pp. 34, 35). 
The remainder of the passage is too long to quote, but may 
be referred to with advantage by those who are disposed to 
pursue a fascinating subject. 
