Chase.] 



244 



. [April 21, 



Monatomic Group ; Dj =: . 768. 



phyllotactic approximation may be merely accidental. The aggregate 

 probability that the combining equivalents of the monatomic elements are 

 modified by phyllotactic tendencies, or the product of all the separate prob- 

 abilities, is more than 5610 times as great as the probability that the ap- 

 proximations are accidental. 



All the indications in this group are in ftivor of phyllotactic influences, 

 the aggregate ratio of probabilities being more than 108436 : 1. Multiply- 

 ing this by the monatomic ratio we get, for the aggregate perissad ratio, 

 > 608375000 : 1. 



172. Artiad Phyllotaxy. 



Di- or Tetratomie Group ; Dj = 1.996. 



6D., 



11.976 



11.974 



.002 



499 



