PLATE Wil. 



I rond filament dichotomously branched, one of the branches 1 

 mbdivided uu> > terminal ramelli. 17.S. [Fig. [40a, b, . are on plat» XVI]. 



Rhipidodesmis. 



caespitosa Gepp. Plant showing tufted habit, nat. sizc. (Ceylon, Ferguson, n°. no 

 in llcrh. Mus. Brit. . 



i 142. Ditto. A plant consisting of a decumbent, irregularly branched, colourless filament, and spring- 

 ing from it nding filament, much ramified with dichotomies distant below, but 

 approximated above. 8. 



I [43. Ditto. Apical ramification of a filament of the >ame, showing approximated complanate fasti- 

 giate mode of branching. The apices show intensely coloured, dense contents. 40. (Whether 

 the ramification lias been flattened in drying we do not km 



( 'allipsygma. 



i 144. Callipsygma Wilsom J. Ag. 1 labit of plant, nat. size. (Australia, Port Phillip Heads, 7. Brace- 



bridge Wihori). a original in Lund Herbarium; b, branch of same in the British Museum. 

 Fig. 14;. Ditto. Portion of same showing peripheral ramification 8. 



14'.. IHtt". Apical portion of same. 40. (Drawn from dried matcrial soaked in water; but n 

 nted as being more turgid than is justified by the preparation). 



dleopsis. 



147. Boodleopsis siphonacea n. sp. Habit of plant, showing the comparatively simple main axis (m.a.) 

 and the multitude of intricated ramelli which arise from its few branches. 8. (Muaras reef, 

 Siboga Expeditii 



[48. Ditto. Upper part of same main axis, showing the uneven outline, the thick walls and di 

 tonuuiN branching. 40. 

 . .. Ditto. Lower portion of same showing thick walls. faint striae, and lax reticulate markings. 200. 



[50. Ditto. Upper part of main axis with two branches, which are copiously divided into the cha- 

 racteristic ramification of the plant, by divaricate alternating dichotomies at short intervals 

 or frequently by trichotomy or rarely by verticils [v). A few rhizoids are shown r 



151. Ditto. Verticillate node of same (fig. 150, v). ■ 500. 



152a and /'. Ditto. Terminal ramelli of same, showing dichotomy .\.nd trichotomy. 200. 



