48 En-Floride», BatracliospermeaB. 



Conspectus subfamiliarum. 



I. Thallus celluke apicalis divisione transversa in longitudinem 

 crescens. 



Batrachospermo3. — Axis principalis longe articnlatus, ramosus, 

 vcrticillis raniellorum ad ununiqnemque articulum instructus, ple- 

 rumque rliizoideis corticatus fSpecies omnes aquae dulcis incolse]. 



Chantransiem. — Thallus sistens filamenta articulata plerumque 

 nuda, irregulariter ramosa; rami filo primario conformes, haud ver- 

 ticiUatim dispositi [Species omnes, excepta BalJnanid, marinae ')]. 



II. Thallus apice structura filamentosa donatus (et per eam in 

 longitndinem cresi^ens), stratum et medullare et corticale prsebens. 

 Oystocarpia cortici immersa [Genera omnia marina]. 



Nemaliece. — Gonimobkistus caespitulos densos confertos pkis 

 minus globoso-rotundatos efficiens. 



Dermonemeo3. — Cystocarpia in strato corticali nidukmtia, hand 

 acuto definita. Gonimobkistus c;espitnliun vaklc ramosum sistens. 



Subfam. I. BATRACHOSPERMEiE (Ag.) Kuetz. 



Bd/rffcltn.yicrHtca' A'j. [1824] Syst. Al^^r.f. p. XXlll, e\c\. gi i'., Kiiotz. [184.3] iii 



Liiiii.ia XVII, p. 96, l*liyc. .^-oiiei'. p. 321, tiib. 8, Sp. (1S49), i» 535. 

 Halracltd.^pcritiithe Liiuil. [1847] Vej^-et. Kin.tid. p. 22, e\cl. ;,'eii. pliii'. 

 Batntfltos/iermncetj} Rabeiili. [1868] FL Kur. Algar.Ill, p. 404, Haiis^^ Pfodr. 1. 1..22. 



Frons filiformis, articulata, ca3spitosa; filamenta plus minus ramosa, 

 tiun nuda tum corticata, crescentia indefinita donata, verticillis ra- 

 mcllornm articulatorum plus minus confertis ornata el propter hos 

 nodoso-moniliformia, nuico matricali subfirmo involuta. Cystocar- 

 pia et antheridia plerumque ad apices ramorum evoluta. Protothal- 

 lus chantransiaiformis e carposporarum germinatione oriens, dein 

 frondem genuinam sexualem Batrachospermi evolvens. 



Obs. Alga3 in aquis rapide fluentibus crescentes, violace^o, vio- 

 ku^eo-purpurea^ vcl C(eruleo-virides, lubrica^. 



') Cavendum cst ne in Chaniransieis genuinis includantur species aqua) 

 dulcis incolae et olim generi ChantransioB relatte, qu?e stadium evolutionis 

 (protliallum ab auctoribus nonnullis nuncupatum) BafracJiospermi et Lema- 

 necs sistunt et ad calcem hujus voluminis in genere Audouinella Bory inclu- 

 'luntur. 



