• its filaments and in their manner "i tapering to the apices which in some 



of ii tortuous. It differs from all "f them in having its filaments more 



ui mor and from ./. amadelpha ii differs in having 



G. Agardh. 



i II. uv. Exsicc. Friendly I-~l.ui.ls n° 



i \ .. I'ill AJg. Syst. \'. (1887 i'. 54 . Murray et Boodle in Journ. <>f 

 Wil. 1889. i'. 71 (pro parte . De J > «m Syll. Alg. 1. 18S9. p. 515 'pro parte). 



forma typt 



Hab. PACll I ndly Islands 1855, Harvey n°86 in Herb. Mus. Brit.! and Herb. Kew! — Vavau, 

 Harvey in Herb. Mus. Hrit. ! 

 IND] .1 Expedition. Stat. 129. Karkaralong Islands, reef! Stat. 131. Beo, Karakelang 



lsl.uuls, reef! — Stat. 21 ;. Saleyer reef! — Stat. 299. Buka Bay, Rotti, reef! — Stat. 312. 

 Saleh Bay, Sumbawa, 15 — 30 111. 



var. robustior : 



//,. : ' Bapon, s. 2. 94. Ridley\ — Singapore, Foas, Feb. 1890, Ridley n" 103, in Herb. 



Mus. Hrit! 



Plant green to greenish-brown, up to 10 cm. high, either bearing fronds on branches 

 issuing in a tuit from a rhizome, or forming a more or less compact clump ot shortly 

 stalked fronds. 



Rhizome abbreviated, bearing slender dichotomously divided branches up to 1 — 2 cm. 

 or passing at once into the short stalks of the fronds. Frond varying from cuneate- 

 obovate and lacerate, to cordate-subrotundate and almost entire. always thin. sometimes zonate, 

 varying in size up to 5 cm. long by 6 cm. wide. but commonly about 2 cm. either way. 



Filaments of frond mostly 25 •>. in diam. and tapering to about 6 y. at the colourless 

 apices, which are frequently irregularly torulose and tortuous for a short distance behind their 

 filaments of the interior cylindrical, straighter and often yellowish-brown in colour. 

 ra-dichotomial constrictions distinctly long-necked. [Figs. 105 — 109]. 



ma typica. 

 Fronds borne on dichotomous branches up to 2 cm. long, cuneate, commonly obovate 

 sometimes zonate. (NB. The plants figured figs. 105, 106 are dried 



. var. nov. (? spec. propr. Avrainvillea robustior). 



reviated, thick, hearing a few branches from which arise the more or less 



ort stalks 3 — io mm. long. Fronds cuneate-oblong to cordate-rotundate, 



•nc another, rather thin, zonate, entire or fringed. Frond-filaments with 



tomial constrictions. The whole plant stouter and more luxuriant than 



