310 MERISTIC VARIATION. [part i. 



of Radial Series, the petals of a flower may all together take on 

 the laciniated condition 1 . 



Further study will indeed probably lead to the recognition of 

 a principle which may be thus expressed : that jxtrts which in any 

 one body are alike, which have, that is to say, undergone similar 

 Variation in the past, may undergo similar variations simid- 

 taneously; a principle which, if true at all, is true without regard 

 to the morphological position of the parts in question. 



1 For cases see Masters, Vegetable Teratology, 1869, p. 67. 



