Amphiroa. CORALLINES (A'UCTOR. ARESCH.)- 543 



30. A. FIRMA (Kiitz. Spec. p. 70 i) mimila, basi attenuata, subra- 

 mosa, ramis brevissimis opposilis; articulis inferioribus tereli- 

 lus, diamelro paruin longiorihus I. siib;equalibus, superioribus 

 alulis, cuneatis, apico profiuule nmarginalis. Long 3 i"'. Cras- 

 sitios articulorurn infimorum ppnnto passorintc; ailictili siiperio- 

 res 1 \ '/ 4 " '"I", 3 /Y" lo 'MJ'. 

 Hal), ad Caput bonae spci (Kiitz. I. c.) - \ix Amphiroa.- species. 



XCI. CHEILOSPORUM Aresch. mscr. Amphiroa sect. IV. Chei- 

 losporum Decaisne Ann. des Scienc. nat. 1842. Bot. vol. 2 

 p. '125. Endlich. Supplem. III. p. 49. Harv. Ner. austral, 

 p. 10 1. Kiitz. Sp. p. 104. Corallinae spec. Lainour. alio- 

 r unique. 



Frons calcarea, fragilissima, ima hasi subteres. superne compresso- 

 plana dichotoma, e duobus celltilarura stratis, cortical! collulis 

 elliptico-rolnndatis et interior! cellulis elongatis in xonas trans- 

 vorsales snpcrimpositas coordinalis formate), constnicta , arli- 

 culata; articuli obsagiltali I. obcordati genicnlis ecorticatis l>re- 

 vibus stibadpressi. Keramidia in niargine lobonim superior! 

 articulorum utrinque immersa extus tuniescentia, poro pertusa. 

 Perisporia e pariete keramidii interiori stiberecta, sporas quat- 

 tuor zonatim secedentes includentia. 



Genus inter Amphiroam positura atque Artlirocardiam, ab ilia 

 cum keramidionun loco turn geniculis ecorticatis non minus quam 

 ab bac fronde dichotoma aliisque notis abunde diversum videtur. 

 Frons in omnibus speciebus oeque calcarea, fragilissima, basi teres 

 soepequo simplex I. si mavis caulescens, apicem versus magis magis- 

 que compressa 1. cornplanata, plerumquc regulariter dichotoma. 

 Articuli infimi plus minus subteretes, superiores et supremi compla- 

 nati I. omnino plan!, obcordati, obsagittali I. lunati; lobi modo plan! 

 dilatati, modo subulati I. alteiiuato-subteretes. marginc superior! 

 marginem inleriorem loborum articuli stiperimpositi tangcnte ad- 

 pressi, I. ab his remoti. Stratum corticale form a turn esl cellulis 

 rotundato-ellipticis, inlernum cellulis valde elongatis linearibus, qua> 

 in geniculis adhuc longiorcs, in zonas transversales superimposi- 

 tas coordinate sunt. Keramidia sph;erica margine loborum supe- 

 rior! articulorum immersa, extus protuberanlia, utrinque normaliter 

 solitaria sed nonnunquam bina, ulrumque vero sa'pc in eodem 



