296 



ROBERT B. MONTGOMERY. 



one occurred in like-sex twins. The striking points of similarity 

 in the different sets are enumerated below. Table I. gives the 

 complete list of patterns. Although twins 25-26 have the same 

 formula, they are not classed as identical because of the very 

 rudimentary character of one of the patterns and so do not meet 

 the conditions stated above. 



TABLE I. 



COMPLETE LIST OF ALL TWIN PATTERNS.! 



