Page 90, Table VIII, column 5: 350·000 and 150·000 changed to 350,000 and 150,000.
Page 97: No creature lies or dies to itself, ... changed to No creature lives or dies to itself, ...
Page 104: Danske Aerofile Alghe changed to Danske Aërofile Alger.
Page 114: Recherche sulla Malattia del Riso ... changed to Ricerche sulla Malattia del Riso ....
Page 115: ... sur de polymorphisme ... changed to ... sur le polymorphisme ....
Page 116: literature notes 38 (Robbins) and 48 (Schindler) changed to 33 and 34 respectively.
Page 120: Zygorrhynchus vuillemini changed to Zygorrhynchus vuilleminii as elsewhere.
Page 126: references to Waksman[24] and [24e] changed to [25] and [25e].
Page 129: ... preparée de la pres de Russum ... changed to ... préparée de la terre humeuse du Spanderswoud, près de Bussum ....
Page 134: reference to Kohshi[24] changed to [34].