ERRATA. 



For Read 



M. Natchet ... M. Nachet. 



Prognocentrtjm ... Prorocentrum. 



Lagenella ... Lagenello. 



ChLOROGONIUM ... COLACIUM. 



Flagilaria ... Fragilaria. 



unindentata ... unidentata. 



389, insert Genus Liostephania from page 492. 

 469, insert three genera as named at page 490. 

 529, 530 and 531 for Vorticellina read Vorticella. 

 647 line 7 for Cvclogena read Cycloglena. 



The Appendix mentioned at page 92, will be included in a supplement and 

 published separately. 



