ERRATA. 



Page 133, line 12 from top, for " C. decussatus" read " C. decussata." 

 264, line 13 from top, for " trunculus" read " mttattcs." 

 280, line G from bottom, for " variatal" read 'varietal." 

 340. line 1 1 from top, for " sfriatHla" read "ffallina." 

 357, line 13 from top, for " elliptica, var. oblonga" read " ohlonga. 

 390, line 2 from top, for " Hypothyris" read " RhynchoneUa" 

 402, line 17 from top, the word "types" should not be in italics. 



