VARIATION AND HEREDITY IN TWINS i6s 



however, although both sole patterns of Mary and the 

 left one of Margaret are alike (Fig. 55), the right sole- 

 print of Margaret had a totally different configuration. 



Fig. 55. — Sole-prints of the conjoined twins Margaret (above) and 

 Mary (below). Note that the right of Margaret is a mirror-image of 

 the left of Mary, but that the right of Mary shows a totally dillerent 

 pattern from her left. (From Wilder.) 



The left sole of Mary and the right sole of Margaret are 

 more nearly identical than are the right and left soles 

 of Margaret, which is a good case of mirror-imaging 



