le m 
Falklands, etc.) CRYPTOGAMIA ANTARCTICA. 
Has. Hermite Island, Cape Horn; Falkland Islands, and Kerguelen's Land ; abundant. Var. Davisi, 
Hermite Island ; rare. 
i The somewhat different habit, more regular primary ramification, and more erect, denser, and less divided 
garter dh, ramuli, had induced us to separate the var. 8. from the original P. Berkeleyi : an opinion we have now abandoned, 
olor lide ne, after a careful examination of very many specimens ; amongst which, forms connecting the two may be found. 
magnified, Though not included by Montagne under his genus Heterosiphonia, the structure of the tubes forming the frond 
۱ ; of P. punicea is the same with that of Heterosiphonia Berkeleyi, of which we have examined an authentic specimen, 
ovais tena communicated by our friend the Rev. M. J. Berkeley, and differing in no respect from P. punicea. We scarcely, 
femos rang however, think that the varying diameter of the tubes in the genus Polysiphonia authorizes a division of the genus ; 
inoribos ales for, in some species, as the present, the increased size of two of the tubes, though conspicuous under favourable 
metro Quim circumstances, affords but an obscure character ; and in some species the difference of diameter is trifling. 
24. RHODOMELA, Aj. 
1. RuopowzrA patula, Hook. fil. et Harv.; fronde cylindracea brunnea cellulis irregularibus notata 
xo, Tti p d vage bipinnatim ramosa, ramis alternis elongatis horizontalibus suberecto-patentibusve minoribus elongatis 
a | patentibus subsimplicibus alternatis nudis. Nobis in Lond. Journ. Bot. vol. iv. p.264. (Tas. CLXXXIH. 
8 : 
Fig. IV.) 
Haz. Falkland Islands ; Port William and Berkeley Sound, rare. 
ugh dai al Frons 4-6 unc. longa, basi diametro 4 lin., vage et patentim ramosa. Caulis primarius subsimplex, ramos 
alternos, patentes, elongatos emittens. Rami laxe ramulosi, ultimi breviusculi, e tubulis 4 magnis circa cavitatem 
centralem dispositis extus strato cellulorum confertorum circumdatis conflati. Substantia membranacea. Color 
xin d ۳ luride brunneus v. fuliginosus :—charte adheret. 
Similar to the following, and, perhaps, not specifically distinct : it differs in the ramification ; and in the absence 
fone ki of the very numerous short ultimate ramuli so copiously scattered over the branches of R. Gaimardi. 
Prats CLXXXIII.—Fig. IV.—1, portion of plant of the natural size; 2, portion of stem and ramulus :—mag- 
lanetro milii nified. 
NA. 2. Ruopomera Gaimardi, Ag.; fronde cylindracea flabellatim ramosissima, stipite simplici filiformi, 
ramis primariis divaricatis, secundariis patentibus bipinnatim multifidis segmentis alternis, ramulis brevibus 
habelatin aos, setaceis simplicibus furcatis quadrifidisve seepe secundis per totam frondem sparsis. Nobis in Lond. Journ. 
Ty ; Bot. vol. iv. p.264. Agardh, Spec. Alg. vol. iv. p. 380. (non Mont. in Voy. au Pole Sud). (Tas. CLXXXIV.) 
Haz. Hermite Island, Cape Horn, and in Berkeley Sound, Falkland Islands; not uncommon. 
ini d Frons 4-6 unc. longa, crassitudine setze porcine, basi simplex, superne in ramos 3-4 primarios flabellatim 
mi, un a divisa. Rami primarii subdichotomi v. irregulares, divaricati, repetitim bifarie ramulosi; rami secundarii tertiariique 
elongati, simpliciusculi, filiformes, ramulis brevibus ornati. Ramuli 2-3 lin. longi, sepissime secundi, tenuissimi. 
p of ramal ul Structura ut in R. patula. Color luridus. 
This, which we doubtfully referred in the London Journal of Botany to the R. Gaimardi, Ag., appears to 
us decidedly the plant of Agardh; and our friend, Dr. Montagne, has kindly furnished us with a specimen of 
1 al the Auckland Island species, to which he had applied this name, and which belongs to another plant. The 
R. Gaimardi of Dr. Montagne is assuredly our Polysiphonia botryocarpa, (Pt. 1. p. 181.) and has very much the 
E d appearance of a Rhodomela. The specimens, from which the above description is taken, were gathered in the 
q. Junt. M same locality as that from whence the typical plant of Agardh was brought by Gaudichaud; and they agree with 
Z 
