WG 
172 CRYPTOGAMIA ANTARCTICA. | Fuegia, the 
2. GRACILARIA (?) aggregata, Hook. fil. et Harv.; ceespitosa, nigrescens, frondibus fastigiatis e basi 
communi late scutata carnosa ortis plurimis filiformibus, primariis cylindraceis cartilagineis vage subdichotome 
ramosis, axillis angustis, ramis erectis simplicibus furcatisve omnibus compresso-cylindraceis filiformibus 
superne subfastigiatis apicibus obtusis, fructu ? Nobis in Lond. Journ. Bot. vol. iv. p. 261. 
Has. Falkland Islands; on rocks in Berkeley Sound, Dr. Lyall. 
Frondes 3-4 unc. alte, vix 4 lin. diametro, e basi scutata, 4 unc. late, dense fastigiatee, siccitate rigidee, madore 
cartilagineze, irregulariter superne preecipue ramosse, basi cylindracez, interdum simplices, nunc e basi regulariter 
dichotome ramoss. Rami omnes erecti, axillis angustis, sinubus obtusiusculis, ultimi paulo latiores. Color nigro- 
purpurascens, siccitate ater ;—charte non adheret. Habitu Polyidis rotundi. 
Of this, again, we have seen no fruit ; but the structure of the frond is exactly that of the genus Gracilaria, to 
which we consequently refer it. 
23. POLYSIPHONIA, Grev. 
. 1, POLYSIPHONIA atro-rubescens, Grev. Harv. in Brit. Fl. vol. ii. p. 331. 
Has. Berkeley Sound, Falkland Islands; scarce. 
Only a few specimens of this species, and in an immature state, were procured: they very closely approach 
British ones in structure, but are, perhaps, more branched; though we can detect no specific differences between 
them.. They. differ from the following species in substance and in wanting the fibrillous apices of the ramuli ; the latter, 
however, is an unimportant character. 
The species ranges from the Mediterranean Sea to the coasts of Scotland. 
2. POLYSIPHONIA fusco-rubens, Hook. fil. et Harv.; atro-rubescens, obscure articulata, rigidiuscula, 
multistriata, frondibus irregulariter dichotomis, caule angulatim flexuoso gracili sensim attenuato, ramis 
majoribus dichotomis, minoribus alternis strictis elongatis, ramulis paucis subulatis erecto-patentibus, axillis 
primariis patentibus secundariis acutis, articulis e tubulis octo radiantibus coloratis formatis, ramorum dia- 
metro duplo-triplo-quadruplove, ramulorum sesquilongioribus, (Tas. CLXXXIT. Fig. I.) 
Has. Falkland Islands; Mrs. Capt. Sulivan. 
Caules primarii ramosissimi, fasciculati, 6-8-unciales, graciles, filiformes, basi nudi, superne sub-angulatim 
flexuosi, ad angulos ramos 2 unc. longos emittentes, rigiduli, Rami ramulique erecto-patentes, laxe pluries divisi, 
faseieulati, ultimi longitudine varii, 4-2 lin. longi, elongati v. subulati, omnes rigidiusculi. Color atro-rubescens :— 
chartee laxe adheret. 
Very similar indeed to the P. atro-rubescens, but differing in the flexuose stem; also allied to P, anisogona, 
nob., but of a totally different texture and consistence. 
Prate CLXXXII. Fig. 1.—1, ramuli; 2, apex of ditto; 3, transverse section of ditto :—all magnified. 
3. PoLYSIPHONIA anisogona, Hook. fil. et Harv.; atro-rubescens, flaccida, madore fragillima, frondibus 
ceespitosis irregulariter ramosissimis equalibus setaceis articulatis vix attenuatis, ramis ramulisque alternis 
subdichotomisve erectis v. appressis, axillis angustissimis, articulis variis inferioribus diametro sextuplo, 
superioribus duplo triplove longioribus, ultimis sesquilongioribus v. quadratis, omnibus striis sex notatis e 
tubulis duodecim tenuibus radiantibus endochromate repletis formatis, ceramidiis ——? Nobis iw Lond. 
Journ. Bot. vol. iv. p. 968. (Tas. CLXXXIL. Fig. IT.) 
“Has. Hermite Island, Cape Horn, and the Falkland Islands; not common. 
