14 THE BOTANICAL MAGAZINE. [Vol. xxx. No m. 



Distr. : Ceylon ; E. Africa ; Ovalau ; New Holland ; Ryukyu. 

 Gelidiopsis pannosa (Grun.) Schmitz ; De Text Syll. Alg. IV, 4.10. 



Yap (SllIMAZAKl). 



Distr. : Samoa Isl. ; Ryukyu. 



Explanation of figures in Plate I. 



Fig. 1-6 : Dilophus radicans n. sp. 



portion of frond slightly magd. ; all roots omitted in the figure, 

 piece of frond, almost in nat. size ; breadth a little broader, 

 frond of fig. 2 magd., showing root-fibres produced from the 



undersurface, ^. 

 growing apex, magd. 

 cross-section of frond, ~. 



6 : root fibres emitted from margin. 



.«3 

 1 



Fig. 7-18 : Haliseris repcns n. sp. 



7 : small frond but almost perfect, J-. 



8 : frond of fig. 7 magd. (1-3 mm. broad), — . 

 9, 10 : two pieces of frond, — . 



11 : frond of fig. 10 magd., — . 



12: root-fibres emitted from margin, -^. 



13 : root-fibres emitted from midrib of the under-surface, — . 



14 : one of root-fibres from midrib, -if!i. 



15 : 3'oung frond bearing hairs, — . 



16 : surface view of frond at the portion marked a in fig. 15, — . 

 17-18. One and the same cross-section of frond showing midrib 



and marginal portions, -i^. 

 Fig. 19-21. Halarachnion calcarcitm n. sp. 



19 

 20 

 21 



frond, wantin": of holdfast, —. 



cross-section of frond showin<r vounsj auxiliary cell, a, ^^ 



cystocarp ; a, auxiliary cell, ^H. 



Bot. Laboratory, 

 Fisheries Institute, Tokyo, November. 1915. 



