■ ;,„. aboul 20 70 p in diam., often tapering towards apices 

 idelpha .in.1 . /. asari/o/ia), without fibulae or lateral 

 ,, n pallid to deep-orange or brown. 



cserted from surface of flabellum, containing a few 

 M \. 1 [owi loc. cil 

 - \ • . unsightly algae, growing abundantly in muddy shallow 



iiderable depth - Colt [NS loc. cit.). 



Synopsis oi Species. 



e flabellum, but forming more or less 



ipitate or difform lobes, fuscous to nigrescent. Fila- 



■1 in diam., thin-walled, mostly torulose and pallid, 



and there dark brown A. Rawsoni (p. 221. 



Jubflabellate forms are also tbund in A. Ridleyi and 

 .1. amadelpha f. Montagneana\. 



Thallus developing one or more flabellate fronds. 



Filaments 40 7<"> •/.. often tapering down to 207. at their branched 



apices, distinctly moniliform and pale t<> dark brown. Rhizome 



horizontal, stout; frond fuscous, either small thick cuneate (f. 



fulva . or stipitate. large tc> very large 4. nigricans (p. 23). 



Filaments 40 — 60 u., not tapering, cylindrical, strongly constricted 

 ove dichotomy, often deep orange brown. Frond usually longly 

 stipitate, large, brown ■ . A. Mazei (p. 27 . 



iments 30 — 60 •/. not tapering, cylindrical, strongly constricted 

 dichotomy, yellow to intensely fulvous. Frond shortly stip- 

 itatr to subsessile, small or large, brown with a tinge of yellow 

 in it A. erecta (p. 29). 



Filaments usually 40 — 60 a, ultimate ramuli about 30 a increasing 

 ■ at their cla\ r ate apices, cylindrical. statcd to bc green. 

 Frond stipitate, small. widely cuneate A. obscura (p. 



-^^ y., ultimate ramuli about 35 — 40 jut,, gradually 

 increasing to 50 — 55 « at their clavate apices, often torulose, 

 with d( ometimes orange contents. Frond stipitate, 



flabellate, medium size, green A. clavatiramea (p. 



usually torulose but sometimes more or less 



vith pale brown contents, here and there dense brown, 



ultimate ramul times subclavate. Fronds short, brown. con- 



•i] a thi iase, thick. difform. often concrescent, 



ivided, flabella absent or eroded /. Ridleyi. p, 



-V> 



