532 Eu-Floridez, Rhodymenie:e, Sebdenia. 
— 
plurimas, sinu rotundo sejunctas suà formà Chondrwm fere referen- 
tes. Structura Sebdenie sed differentia minus conspicua inter fila 
media adultiora et exteriora juniora. Tetrasporangia rotundato-elli- 
ptica, eruciatim divisa, fere in soros conjuncta, inter fila strati 
corticalis singula. 
Sebdenia Monardiana (Mont.) Derth. in Mitth. Zool. Stat. zu Nea- 
pel III, 4 (1882), p. 530, Halymenia  Monardiana Mont. Crypt. 
Alg. p. 8, Fl. Algér. p. 115, tab. 11, fig. 2, Kuetz. Sp. pag. 717, 
Tab. Phyc. XVII, t. 2, f. c-d, Zanard. Icon. phyc. adriat. t. LLXHHTZ 3: 
Ap. Sp. II, p. 203, Epicr. p. 1936, Ardiss Phyc. Medit. Lp. P8 
Halymenia palmata Delle Chiaje Hydrophyt. Neap. t. 15, Haly- 
menia mesenleriformis Monard. mser., Halymenia carnosa He- 
ring in Kuetz. Tab. Phye. XVI, t. 98 sec. Zanardini. — Fronde 
carnosa, plana, sessili, dichotomo-subpalmata, segmentis sursum eu- 
neatis, ultimis ceranoideis attenuatis spathulatisve. 
Hab. in mari Mediterraneo ad oras Algeri:&e (MoxaRp et Rous- 
SEL); in sinu neapolitano (DeLLE CurajE, F'ALKENBERG, DERTHOLD); 
ad oras insulze Sicilizte (AnprSsoNE). — Frons a radice scutatà semi- 
cireulariter expansa, 2—4-pollicaris, inferne mox divisa et dein per 
plures dichotomias irregulares subpalmatim decomposita, segmentis 
cuneatim dilatatis, usque pollicem latis, superioribus in lacinias 
irregulares attenuatas vel quandoquidem spathulatas integras ob- 
tusas aut sepe multidentatas abeuntibus. Cystocarpia utrinque di- 
sposita, plerumque in segmentis p:enultimis confertim aggregata. 
Color coccineo-purpureus. Substantia frondis exsiccatz fere per- 
eamena; specimina exsicecatione chartz:e non adh:erent. Cellularum 
series plures membranam exteriorem constituunt; fila interiora 
densius quam in speciebus typicis intertexta. 
. Sebdenia dichotoma Berth. in Mitth. Zool. Stat. zu Neapel III, 4 
(1882), p. 550, t. II. — Fronde secus directiones eruciatim inter- 
sectas dichotome ramosa, segmentis crassiusculis, subcompressis, 
swpe proliferis. 
Hab. in sinu Neapolitano (BEnrHorLp). — Frons elata, ambitu 
orbiculater flabellata subdichotoma, axillis rotundatis, seezmentis ad- 
ultioribus usque ad 1 em. latis, superioribus angustioribus, supre- 
mis 1-2 millim. latis, s:epius in:xqualiter furcatis. Color rufescens. 
. Sebdenia? gelatinosa (J. ^g.), Leplosom/a gelatinosa J. ^g. Anal. 
algol. (1892) p. 88, Chrysymenia gelatinosa J. Ag. Till Algernes 
Systematik XI, p. 24. — Fronde plana, supra stipitem evidentem 
brevem cuneatim expansa, subpalmatim in lobos paucos principa- 

