1806 Eu-Florideae, Corallinaceae, Ainphii-oa. 



parvo exsurgens erecta, articulata, tereti-filiformis seu subteres, 

 compressa vel plana, di-trichotoma vel dichotomo-verticillata, e 

 duobus cellularum stratis, corticali cellulis minoribus et inferiori 

 cellulis elongatis in zonas transversales superimpositas coordinatis 

 formato, constructa; articuli polymorphi, geniculis corticatis bre- 

 vissimis vel longioribus adpressi vel separati. Conceptacula per 

 superficiem articulorum sparsa, immersa aut plus minus promi- 

 nentia, cavitate schizogena poroque apice pertusa. Sporangia zo- 

 natim divisa '). 



Obs. Frons, ut clarus Areschoug in opere J. A.gardhii docet, in 

 omnibus plus minus calcarea, immo interdum sublapidescens et 

 pro calcis frequentia plus minus fragifis, nunc teres omnino, nunc 

 prajsertim versus apicem compressa, coraplanata vel plana onmino, 

 in pluribus normaliter di-trichotoma, quamquam dichotomiie inter- 

 dum plus minus irreguhires, in nonnullis compositse dichotomo- 

 verticillata, i. e. rami primarii dichotome dispositi ramulis verti- 

 cillatis obsessi, articulata. ArticuU teretes, compressi, complanati 

 v. plani, Uneares, oblotigi, cuneati v. elliptici, nunc adpressi, i. e. 

 genicufis Hnea transversafi tantum notatis (lineaeformibus) separati, 

 distantes, i. e. geniculis longioribus interpositis remoti; genicula 

 ecalcarea igitur nunc brevissima, nunc longitudine diametrum 

 Dequante, nunc multiplo longiora consistentia firmiori, in vivo ple- 

 rumque rubra in sicco nigrescentia. Stratum corticale constituitur 

 cellulis subellipticis in series ex strato interno verticales ordinatis, 

 subvacuis, in geniculis vero densissime compactis et endochromate 

 largiori repletis ; stratum interius cellulis longitudinalibus linea- 

 ribus elongatis, interne vacuis, omnibus ejusdem longitudinis lati- 

 tudinisque, i. e. fastigiatis, in zonas transversales superimpositas 

 hixe connexis, in geniculis vero brevioribus denseque stipatis con- 

 structum. Conceptacula subsemiglobosa seu verruc;eformia, minuta. 



Sect. I. EUAMPHIROA Decne 1. o. p. 123 (111). — Articuli c.ylindracei, concepta- 

 culis verrucosis plus minusve inspersi. 



1. Amphiroa valonioldes Yendo Corall. Japou. p. 5, t. I, f. 1-3, t. 4, 2948 

 f. 1. — Fronde pulvinato-caespitosa; ramis paucis, patentibus, la- 



') Phycologis satis constat clarum V. Trevisan (Note sur les Corallines 

 p. 822) jam anno 1849 declarasse Amphiroam statum sistere tetrasporangiferum 

 CoralUneannn. 



