errata. 
On page 35, fourth line from bottom for P- H read P ^ pp U , 15, 
32, after “Postscript,” /or Pp. ^ u ’ ’ 
16, 18. 
924 line 13, for “plants,” read points. 
” 242, line 11, for “ Poleynian,” read Polynesmn. 
” 265, line 4, for “ nnmoved,” read universal. 
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