Eu-Floridez,, Gracilarieze,, Gracilaria. 433 
interioribus rotundatis, exterioribus verticalibus. Placenta magis 
depressa, nune subbiloba, parum conspicue lobulosa, fere zequaliter 
a tota superficie fila carposporifera emittens. Frondes a plexu ra- 
dicali ezespitos:, adscendentes, angust: elongati, semipedales, lati- 
tudine vix 2,5 millim., madefactae compress:e, exsiccatione ulterius 
collabentes ita ut utrinque longitudinaliter subcanaliculatze appa- 
reant, ramis a margine exeuntibus. hami in fronde primaria sub- 
indivisa laterales, basi evidenter constricti, apice longe attenuati, 
bis aut ter diehotomi. Segmenta elongata erectiuscula. Color ro- 
Seo-carneus. 
II. Subgen. CERAMIANTHEMUM (Don.) J. Ag. Sp. II, p. 593, Epicr. p. 413: frons 
cylindracea aut compressa quoquoversum fructifera, cellulis interioribus 
proxime exteriores parum magnitudine superantibus, parietibus crassis, 
cortiealibus in sterili submonostromatieis; pericarpii cellulz:& interiores 
subdissitzae plerumque conspieue anastomosantes; placenta conspicue lobu- 
losa, inter lobos a parietibus eryptarum fasciculos filorum emittens; te- 
trasporangia inter fila strati cortiealis magis evoluti nidulantia. 
Species frondibus teretibus quoquoversum ramosis, ramis acuminatis diva- 
ricatis. 
Gracilaria armata (A^o.) J. Ag. Alg. Liebm. p. 15, Sp. II, p. 591, 
Epicr. p. 414, Hauck Meeresalgen p. 182, Ardiss. Phyc. Medit. I, 
p. 949, Spharococcus armatus Ag. Aufzáhl. p. 73, Kuetz., Sp. Alg. 
p. 774, Tab. Phyc. XVIII, t. 77, Plocaria armata Mont. Bonite 
p. 100, Fl. d^ Alg. p. 71, Hypnca armata J. ^g. Alg. med. p. 149, 
Spharococcus confervoides var. verrucosus Ag. Sp. p. 306 (partim 
et excl. syn.), Fucus confervoides var. ramosissimus Bert. Amoen. 
p. 999 (excl. syn.) Sph«erococcus dwrus Kuetz. Phycol. p. 408, 
tab. 61, II (non Ag), GZgartina dura Mont. Canar. p. 160, SpAa- 
rococcus mullipartitus var. Mont. Plant. de Done (fide J. Ag.). — 
Fronde tereti, undique ramosa, ramis decompositis lateraliter ramu- 
losis, nunc curvatis et extrorsum subsecunde ramulosis, ramulis 
lateralibus apicibusque a basi crassiore acuminatis, fructiferis evi- 
dentius subulatis; cystocarpiis sessilibus in ramulo singulis aut 
pluribus. 
Hab. in mari Mediterraneo et Adriatico ad littora Italie, Gal- 
lie, Afrieze usque ad Gades. — Frons usque pedalis, a disco late 
expanso exspitose surgens, teres, ramis elongatis per totam longi- 
tudinem lateraliter ramulosis. Ramuli patentes, medii plerumque 
longiores, 4-8 cm. longi, omnes ramellis aculeiformibus simplicibus 
aut denuo decompositis obsiti, ssepe in ramulo subincurvo exte- 
793 
