PLATE IV. 



Flabellti' also figs. 123 — 125 on plate XV). 



; Flabellaria petiolata ["revisan. Habit of plant. Several pi. mts arising from a common root-mass, 



attached to Poseidonia Melos, Herb. Chauvin), nat. size. The fronds are really faintly and 

 narrowly zonate, a feature which this figun fails to show. 

 50. Ditto. </. Filaments of frond shewing lateral appendages of unequal length 83; b. pari 



single lateral appendage consisting of .1 stalk and part of its botryoidally lobulati terminal 

 expansion 472. 

 Ditto. Filament of stipes with lateral app <>. 178; b. ultimate divisions of lateral 



appendage with blunt apices (thick-walled in reality 4;'-'. 



'adocephalus (see also figs. 137 [40 on plate XVI and XVII). 



i iocephalus luteofuscus Börgesen. Fïabil of plant (Guadeloup 11". 1904, in Herb. Mus. 



Brit. nat. size. 



Fig. $3. Ditto. </. and b. Branches of main filaments of front of the same, densely ramified at apex 83; 

 c. terminal ramification 178; d. ultimate ramelli 472. These terminal ramifications com- 

 bine to form the felt-work, which covers the main filaments. 

 Ditl I ilaments of frond (Herb. Chauvin) shewing terminal ramification of branches 83; 



b. ultimate ramelli 472. 



i j Ditti 1. I ilaments of stipes Guadeloupe, Mazê n". 19041 shewing ramification of branches 



b. ultimate ramelli of same thickwalled in reality 472. 



