43 



tetragonidia and hair tufts, //, -^. Fig. 9 ' oosporic sori, ^. Fig. 

 10 : tetragonidia, 1 *. 



PL. CXIII. Fig. 1 : tetrasporic frond of a pinnate form of 

 Dictyota dichotoma (Huds.) Lamour., (Cape I\vai, Prov. Rikuzen) \. 

 Fig. 2 : cross-section of the frond, 3 J 9 . Fig. 3 : younger forms 

 of tetragonidial sori, ?. Fig. 4- : tetragonidial sori more advanced, 

 \. Fig. 5 : tetragonidia, - 4 1 a . 



Dictyota dichotoma (Huds.) Lamour. 



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