Eii-Floi-ideao, Gi;,^ai'tiiica', Gigartina. 209 



jugamento siniiles, basi subattenuata teretiusciili, (lidintonii vel 

 snbpinnati. Rarnenta disticha sparsa, nnnc croberrinia, cylindracea, 

 2-5 niillini. lon^a, plicato-rngosa, apico p]erum<[uc biCurcata, rarius 

 simplicia vel trifurcata, et ramnlosa. Cystocarpia pericarpio sub- 

 cyathiformi, demum poro pertuso, in apice ramentorum sito in- 

 clusa, carposporis obovatis numerosissimis. Tetrasporangia snl) 

 strato periplierico ramentornm nidulantia contexta, demum cru- 

 ciatim qnadridiviso. Color livide purpurascens. Substantia golati- 

 noso-cartihiginea, plantcie exsiccata^ cornea. 

 25. Glgartina dlvaricata Hoolv. et Harv. Crypt. ant. p. 75, Lond. 407 

 Journ. l^t. IV, p. 263 ct 546, J. Ag. Sp. H, p. 2S0, Epicr. p. 195, Ma- 

 stocarpus validus Kuotz. in Bot. Zeit. 1847, p. 23, Sp. p. 735,' Tab. 

 Phyc. XVH, t. 48?. — Fronde teretiuscula, dichotomo-flabellata 

 subfastigiata, infra segmenta media sa^pe complanata et leviter cu- 

 neatim dilatata ramulisque pinnatim dispositis simpliciusculis a 

 margine docomposita, segmentis supremis (in exsicceata rugulosis) 

 nudiusculis teretibus aut subcomprossis; cystocarpiis in pinnis 

 cylindracois infra apicem immersis, involucro pimiellarum inaiqua- 

 liter ambientinm cinctis. 



Hal). m oceano Australi ad insulas «Camphell» et Novam 

 Zelandiam. — Spocios robusta, 10-20 cm. longa, nunc tota fere 

 teretiuscula, nunc saperno complanata, segmentis mediis subcunea- 

 to-dilatatis. Segmenta superiora exsiccatione magis collabenti i, nunc 

 quoque subcanaliculata adparent. Pinna^ magis cylindraceai in seg- 

 mentis pa?nultimis et antopa^nultimis pnecipue ovoIutaB, unde seg- 

 monta terminalia nuda eminent. Infra apicem pinnai cystocarpia 

 formantiir involucro pinnellis ,3-5 brevibus acuminato-obtnsis cin- 

 cta. Color lividus vel nigro-ruboscens, ad apices ramulorum patli- 

 dior purpurascens. Substaiitia cartilagineo-carnosa, firma, elastica, 

 siccitate valde contracta. Specimiiia exsiccatione charta? non adhfe- 

 rent. Cum Gigartina disticha Sond., proximo convenit, sed in spe- 

 cie Sonderi pinna; sunt plurinuig et ad ramificationem pronge, s£epe 

 admodum divisa?; cystocarpia in pinna abbreviata magis transfor- 

 mata formantur. 



B. Fmndibus planis, dichotomo-llabellatis, demiim ramentis eoiiformiltns at sim- 

 ph'cioribus siilipiiinatis. 



26. Glgartina declplens Hook. et Harv. Alg. Nov. Zel. p. 547, fi. 408 

 N. Zel. p. 252, J. Ag. Epicr. p. 195. - Fronde compresso-plana, 

 lineari, decomposito-dichotoma tlabellata subfastigiata, demum ra- 



14 



