Eu-Floridese, Dasyese, Melauothamnus. 1249 



ERYTHROCYSTIS J. Ag. [1876] Epicr. p. (338, Anal. AJgol. V (1899) 

 p. 121-122 (Etym. erythros ruber et cystis vesica), Engl. & Prantl 

 Natiirl. Pflanzenfam. (1897) p. 480, Lomentarice subgcn. Saccio- 

 phora J. Ag. ]1863j sp. II, 3, p. 738, Dumontice, Lomentarice, 

 Chylocladice sp. auct. — Frons caulescens, ramulis vesiculosis 

 instructa, caule snlido celluloso, cellulis interioribus elongatis et 

 corticalibus rotundatis constituto, ramulis cavis intus fila articulata 

 densiora, superficiem versus in fila verticalia moniliformia fasti- 

 giata abeuntia gerentibus. Cystocarpia ramulis immersa infra su- 

 perficiem distentis filis excavata et secedentibus filis periphericis 

 carpostomium formantia, fasciculum simplicem filorum praegnan- 

 tium generantia; fila carposporiphera invicem libera, a placenta 

 basali (paucis cellulis constituta) superficiem versus radiantia, cla- 

 vato-moniliformia, in articulis terminalibus carposporas obovato- 

 piriformes singulas foventia. Tetrasporangia per superficiem sparsa, 

 rotundata, triangule divisa. 



Ohs. Diagnosin a cl. J. Agardh exhibitam transcripsi. De Lo- 

 mentaria saccata (Grev.) J. Ag. loquens, phycologus lundensis 

 dixit, tetrasporangia illi triangule divisa adparuisse. Farlow (On 

 some new or imperf. known algae of the U. S. I, p. 2), qui scrutatus 

 est sua specimina authentica Damontice saccalce ex herbario Gre- 

 villeano a cl. Balfour communicata, fructus genuinos Ricardice se vi- 

 disse scripsit; qua de causa genus Agardhianum vix sui juris esse 

 videtur. Gfr. ceterum observationes in prsesenti Sylloges volumine 

 ad pag. 556 (sub Lomentaria saccata) et 773 (sub Ricardia 

 Montagnei) allatas. 



1. Erythrocystis Grevillei J. Ag. Epicr. p. 639, Lomentariaf saccata 1956 

 J. Ag. Sp. II, 3, p. 738, Harv. Ner. bor. Amer. II, p. 79, Dumon- 

 tia saccata Grev. mscr., Chylocladia? saccata J. Ag. in Act. Holm. 

 Oefvers. 1849, p. 89, Ricardia Montagnei var. gigantea in Alg. 

 Amer. bor. exsicc. n. 58. — Characteres generis. 



Hab. ad frondes Laurenciae virgatae ex littore Californiae 

 (Douglas, Farlow). 



MELANOTHAMNUS Born. et Falkenb. [1901] in Falkenb. Rhodomela- 

 ceen p. 681 (Etyni. melas niger et thamnos ccespes). — Erons 

 erecta, cylindracea, radiatim constructa, cartilaginea, quoquoversum 

 sparsim (apices versus subdistiche) ramosa. Rami elongati mono- 

 podice evoluti, cellula apicali oblique articulata. Cellulse pericen- 



