ERRATA. 



Page 2, foot-note, second line : For " there" read "these." 

 Page 4, L. libatrix, first line: For " undistinguishable " read "indistin- 

 guishable. ' ' 

 Page 17, line 11 : For "western" read "eastern." 

 Page 67, table 10, Under 7, for " a -f- b -\-c + e+/" read " a + b d + e + 



/". Under S, for "'+'+ <:'+<'+ \t" read " a'+ b'+ d'+ e | c ,." 



Page 80, table 25, top of second column : For " Per cent of value in modal 



class" read " Per cent in Modal class." 

 Page 91, table 32 : Line 8, first column, " 14 " set in wrong font. 

 Page 108, table 41 : Line 17, " 98 " set in wrong font. 

 Page 309, legend of text-figure 31 : Add a = L. albida. 

 Plate 25, in legend, last line : For " shade " read " shape." 



