PLATE XXI. 



1 , ineus Thuret. Coma] filaments (calcified) ol same, ./ 5; b, dichotomy 15. 



! Ditto. •'. surface view of cortex of stipes before d ition, 83 (Antibes, ex Ilcrb. Thuret 



the same 225. c. filament of stipi ol ame with lateral app dichoto- 



mously divided and terminated by very small short truncate apices (compare fig. a), after 

 decalcification, 83. 

 181, 181a. Penicillus Sibogae n. sp. Habit of plant, 8. (Noimini Bay, Timor, Siboga Ex] 



It resembles the Espera form of /'. mediterratieus, but has its filaments smaller, frequently 

 beaded, often trichotomous. At x is shown a lateral cohesion between two adjacent ramuli, 

 probably fortuitous. 

 Ditto. Apex of a filament of same, showing porose calcareous sheath, 1 10. 



Rhipocephalus. 



Rhipocephalus phoenix Kütz. f. typica A. and E. S. Gepp. Habit of plant, nat. size. Copied 



from ELLIS and SOLANDER's plate (loc. cit.). 

 [84. Ditto. f. brevifolia A. & E. S. Gepp. Habit of plant (spirit specimen), nat. size (Bahamas, 



Bemini Harbour, Howe n". 3239). 

 [85. Ditto. Calcified flabellule of same in". 3239) [5. The filaments arise by repeated dichotomies 



in the same plane and are laterally connate. The articuli in this form remain very short. 



The base ha- been torn out ut" the rhachis and retains the stumps of -ix lateral appem 



of the oTtex. 

 1 > 1 t t . ■ ; surface view ol cortex '>t' stipes before decalcification. 83 | Bahamas, Howe, n°. 3239. 



b. the same 225. c. filament of stipes •<( same with lateral appendages dichotomously 



divided and terminated by very narrow, crowded, truncate apices (compare fig. a), after 



decalcification. 83. </ apical ends of same 420. 

 187. Ditto. t". longifolia A. & E. S. Gepp. Habit of plant, nat. size (Key West, Florida, Howe n". [612 . 

 188 Ditto. Abnormally large plant of same. nat. size. (Florida, Rugel, in Herb. Mus. 1 

 189. Rhipocephalus oblongus Kutz. Habit of plant, pressed specimen, nat. size. (Bahamas, in Herb. 



Mus. Paris, sub nom. ^Penicillus Lamourouxii Dne.", but probably Dei m-m 's type of his 



Penicillus oblongus, see ]). • 



