Io ol roro) ro ro to 
CORRIGENDA 
. 30, 1.9 from top, to be added: 9.5 m. 
. 45, 1.12 from bottom, for E. by N.'/; N. read W. by S.'/s S. 
68, 1.5 from bottom, for Hveen read Hveen, 10,5—19 m. 
112, 1.14 from bottom, for Sa read Lb. 
277, 1.14 from bottom, for The fronds read The apical cells of the fronds. 
284, 1.6 from bottom, for f. robusta Kjellm. read f. typica. 
375, 1.19 from top, for 10 high read so high. 
402, 1.18 from bottom, for Dasay read Dasya. 
. 467, 1.7 from top, for sinuosis read sinuosus. 
See further p. 150. 
