775 bis Eu-Floridese, Rhodomelacese. 



Cystocarpia in ramis ramulisque externa, ovoidea aut urceolata, 

 apice carpostomio pertusa, basi lata aut pedicello brevi frondi im- 

 posita. 



Gonimoblastus intra cavitatem fructigenam apice pertusam evo- 

 lutus; carposporoe in apicibus filorum fertilium singulge, rarius ca- 

 tenatim evolutas '). 



Tetrasporangia nunc sparsa nunc in ramulis propriis (stichidiis) 

 congesta, triangule divisa 2 ). 



Antheridia corpora cylindracea globosa aut foliaceo-compressa si- 

 stentia, spermatangiis superficialibus minutissimis confertis. 



Conspectus subfamiliarum. 



I. Constitutio totius frondis monopodica (h. e. segmenta frondis primaria ex 

 articulis ab eadem cellula apicali exorientibus provenientia) aut rarius e 

 segmentis primariis majoribusque monopodicis adparenter sympodica 3 ) et 

 tunc partibus frondis nonnullis mox deciduis donata. 



A) Frons radialiter constructa, erecta vel e basi decumbente exsurgens, raris- 

 sime structura dorsiventrali 4 ) donata. 



§ Frons teres aut complanata, rarius pulvinata r ') contextu grosse parenchyma- 

 tico, axi polysipbonio centrali in partibus adultioribus evidente (mox indi- 

 stincto), cellula apicali in fovea terminali immersa, tetrahedricarum cellu- 

 larum apicalium ad instar divisa. 



') Clarus R. W. Phillips in operibus, quibus titulus est On the Develop- 

 ment of the Cystocarp in Rhodomelacese (Annals of Botany vol. IX, 1895, p. 289- 

 305, T. X; et vol. X, 1896, p. 185-204, T. XII-XIII) eximie illustravit evolu- 

 tionem cystocarpiorum Rhodomelce subfuscce, Polysiphonice nigrescentis, Polys. 

 fastigiatce, Polys. violacece, Polys. thuyoidis, Dasyce coccinece, Chondriem tenuis- 

 simce, Laurenciai pinnatifidai. 



2 ) Cfr. F. Heydrich, Die Befruchtung des Tetrasporangiums von Polysipho- 

 nia Greville (Ber. d. deut. bot. Ges. XIX, 1901, p. 55-71, T. III). 



3 ) Ex. gr. Rodriguezella, species nonnullee Rytiphlazarum, Wilsoncea, Stre- 

 blocladia. 



4 ) Structuram dorsiventralem monstrant Herpochondria, Bostrychia. 



'■') In Laurencia virgata adsunt hinc inde rami apice cirrhi ad instar in- 

 curvi, quorum ope frondes corporibus marinis variis adhserent. De his mentio- 

 nem facit clarus Setchell in ephemeride Erythea vol. IV, 1896, n. 6, p. 98-99. 

 Ceterum, pneter J. Agardh, Stromfelt, P. Magnus, Kny, Wille aliosque aueto- 

 res, de organis hujus naturse, nec non de forma calli radicalis Algarum conie- 

 renda sunt opera sequentia nuper edita: M. Nordbausen, zur Anatomie und Phy- 

 siologie einiger rankentragender Meeresalgen (Jahrb. f. wiss. Bot. XXXIV, 2, 

 1899, p. 236-278, T. VIII), M. Carrie Derick, Note on the Development of the 

 holdfasts of certain Florideae (Botanical Gazete XXVIII, 1899, n. 4, p. 246-253, 

 t. XXI-XXIII). 



