340 Eii-FloridCcV, Rholopliylli^leae, Rliolophyllis. 



conglobatas niuco cohibitas generantes. Tetrasporangia frondi aut 

 processibus marginalibus immersa, zonatim divisa. 



Obs. Frondes omnium plaute, roscae aut rubro-purpureje, mem- 

 branacc^c aut sul)carnoso-membranace9e, exsiccatie stepius membra- 

 naceoe, dichotomo-fastigiata? segmentisiiue marginalibus pinnatne, 

 pinnis in segmenta sensim conformia abeuntibus.Segmenta cuneato- 

 linearia. Stratis cellularum duobus frondes contextoe sunt ; cellulte 

 exteriores coloratne, interiores endochromate granuloso farctte aut 

 hyalinse. 



Subffen. I. Leptophylliuivi (Naeg.) .1. Ag. Epicr. p. 361 : froiule plaiia, supei'- 

 ficie subseqiialiter cellnlosn, dniilici strato celliilanim constiUita, cellulis 

 interioribus secus plurcs series frondis i)lano parallelas sa^pius dispositis; 

 corticalibus brevioi-ibus seciis uiiicaiu seriem utriiiqiie ordiiiatis, interiores 

 cellulas magis a;qualiter obtegentibus; pericarpii cellulis interioribus con- 

 centricas series formantibus, unico loco carpostoraii cum exterioribus ra- 

 diatim dispositis. 



* Tetrasporangiis segmenta frondis occupantibus. 



1. Rhodophyilis bifida (Good. et Woodw.) Kuetz. iti Botan. Zeitnng (-,49 

 1847, p. ^3, Sp. p. 786, Tab. Phyc. XIX, t. 50, J. Ag. Sp. IF, 

 p. 388, Epicr. p. 361, Ardiss. Phyc. Medit. I, p. 216, Fucus hifidus 

 Good. et Woodw. in Linn. Transact. III, p. 159, t. 17, f 1, Engl. 

 Bot. t. 773, Turn. Hist. Fuc. t. 151, Sphmrococcus hifulus Ag. 

 Sp. Alg. p. 2!H), Syst. p 231, Rhodonienia biflda Grev. Alg. Br. 

 p. 85, Harv. Phyc. Brit. t. XXXII (excl. variet.), Leptophyllium hi- 

 fidum Naeg. Algensyst. p. 236, Haljjmenia hifida Duby Bot. Gall. 

 H, p. 445, Inochorion dichotomum Kuetz. Phyc. gener. p. 443, 

 Sp. p. 873, Tab. Phyc. XVI, t. 22, Inochorion cervicorne Kuetz. 

 Phyc. germanica p. 333, Sp. p. 873, Tab. Phyc. XVI, t. 22. — Fronde 

 decomposita dichotoma subflabellata. segmentis linearibus cunea- 

 tisve, margine nudis stepe conglutinatis, terminalibus obtusis; cysto- 

 carpiis submarginalibus; tetrasporangiis ad apices segmentorum 

 sparsis. 



Hah. m oceano Atlantico ab oris Scandinavia^ usque ad Gades; 

 in mari Mediterraneo ad oras Galliae; in mari Ligustico ad «Spezia»; 

 in mari Tyrrheno ad Neapolin (Falkenberg); in mari Adriatico ad 

 oras Istrice (Tnirs, Kuetzing); in Oceano Pacifico et Australi (Mon- 

 tagne). — Frons plerumque vix ultra 5 cm. alt:i, a radice vix discer- 

 nenda glohoso-ciespitosa, partibus cxpansis plus minus tl;iJ)o]latis. 

 lamina nunc inferne latissima cuneata subindivisa, nunc et sa-pius 



