530 Eu-Floridez, Rhodymenies, Sebdenia. 
Fronde membranacea, dichotomo-subpalmata, sezmentis linearibus 
infra axillas cuneatim dilatatis, margine integriusculis, obtusis, li- 
gulis fructiferis nune à disco paginarum gregatim emergentibus 
nune secus margines in alterutera pagina subseriatis. 
Hah. ad « Golden Gate» Californie. — Alga habitu fere Zo- 
dymenice palmate angustioris at quasi minus carnosa, potius 
chartacea dicenda, nee chart:» adheerens. Segmenta erectiuscula su- 
pra axillas acutissimas sublinearia, cire. 7-8 millim. lata, infra ax- 
illas dilatata et hine usque ad sesquicentimetrum lata. Color pur- 
pureus, passim lividus, 
SEBDENIA Berth. [1882] Vertheil. Alg. Neapel in Mitth. Zool. Stat. 
zu Neapel III, 4, pag. 530, Heydr. Beitr. Algenfl. v. Kaiser- 
Wilhelms Land (1892) pag. 477, Schmitz et Hauptfl. in Engl. & 
Prantl Natürl. Pflanzenfam. (1897) p. 408, Halymenia sect. Seb- 
denia J. Ag. Epicr. p. 194 excl. sp., Anal. algol. (1892) p. 53, Le- 
ptosomia J. Ag. [1892] Analecta algologica p. 86 (fide Schmitz), 
Epicr. (1876) pag. 919 (ut subgenus CArysymenie, Halymenic, 
Meristothece, Callymenia, Chrasymenice sp. — Frons compresso- 
plana aut plana, nonnunquam paullisper tubuloso-laxa, furcata 
aut irregulariter laciniata vel lobata, crassiuseula et rigidula; stru- 
etura celluloso-filamentosa. Stratum interius filorum medullarium 
plus minus laxe confertorum, ramosorum et articulos pr:xbentium, 
eontextu cellularum secus plures series dispositarum cinctum. Cy- 
stocarpia sparsa, plerumque minuta et extra superficiem frondis 
parum prominula, Tetrasporangia inter cellulas strati corticalis 
nidulantia, cruciatim divisa. 

1. Sehdenia ceylanica (Harv.) Heydr. Beitr. Kais. Wilh. Land (1892) 963 
p. 477, t. XXVI, f. 16-17, Meristotheca papwlosa J. Ag. Epier. 
(1876) p. 584, Florid. Morphol. t. XXXI, f. 4-7, Callymenia papu- 
losa Mont. Pugillus Alg. Yemens. (1850) p. 11, n. 21, Syll. p. 438, 
J. Ag. Sp. II, p. 293, Kuetz. Tab. Phyc. XVII, t. 73, Zanard. Plant. 
mar. Rubr. enum. (1858), p. 279, Kallymenia evasperata Zanard, 
in Flora 1851, pag. 95, Halymenia ceylanica Harv. Alg. Ceyl. 
exsicc. n. 39, Kuetz. Tab. Phyc. XVI, t. 93 (non bona). — Fronde 
plana, dichotoma aut subpinnatim decomposito-laciniata, segmentis 
linearibus, margine laciniis conformibus dentibusve brevioribus 
obsitis, fructifera dentibus conformibus tuberculisve verrucosis spi- 
nosisve exasperata; cystocarpiis in verrucis marginalibus immersis, 
