FalHanck, etc.] FLORA ANTARCTICA. 479 



Dense csespitosa. Caspites 4-5 unc. longi, intricati. Articuli longitudine varii, iiiferiores valde elongati, 

 supremi brevissimi, omnes striis sex rectis spiralibusve notati, e tubulis duodeeiin tenuibus coloratis circa cavitatem 

 centralem dispositis conflata. 



A fine species, and evidently quite distinct from any previously described ; but unfortunately so tender that it 

 cannot be removed from the paper without breaking ; for which reason our description of the ramification is not so 

 perfect as is desirable. It differs, in the substance especially, from the British Polysiphonia atro-ruhescens, being- 

 more fragile and tender. 



Plate CLXXXII. Fig. II. — A. and B. different states of P. anisogona ; 1, ramulus ; 2, apex of ditto ; 3, trans- 

 verse section of ditto : — all magnified. 



4. Polysiphonia teuuutriata, Hook. fil. et Harv.; rubescens, articulata, multistriata, frondibus gra- 

 cillimis capillaceis flaccidis elongatis circumscriptione ovato-lanceolatis, caule primario subsimplici flexuoso 

 alterne irregulariter dichotome rarnoso, ramis rernotis circumscriptione ovatis ramulisque erecto-patentibus 

 sensiiri attenuatis apice fibrillosis, axillis acutis, articulis ramorum diametro multiplo, rainulorum duplo 

 triplove longioribus sex-striatis e tubulis duodeeim tenuissimis radiantibus coloratis formatis, geniculis 

 incrassatis. Nobis in Lond. Journ. Bot. vol. iv. p. 266. (Tab. CLXXXII. Fig. III.) 



Hab. Hermite Island, Cape Horn ; dredged up in about six fathom water. 



Basis froudis deest. Caidis primarius solitarius? 4-6 unc. longus, capillaris, flexuosus, alterne ramosus. 

 Rami 2-3-unciales, ramulique tenuissimi. 



A very elegant species, allied to P. anisogona, but much more slender, very differently branched, and not fragile 

 when moistened after being once dried. 



Plate CLXXXIII. Fig. III. — 1, plant of the natural size ; 2, branch and ramulus ; 3, ramulus ; 4, transverse 

 section of ditto : — magnified. 



5. PoLYSirHONiA SuUvance, Hook. fil. et Harv.; pusilla, badia, articulata, flaccida, multistriata, fron- 

 dibus fiabellatim ramosis, ramis alterne deconipositis fastigiatis, ramulis sparsis alternis subulatis simplicibus 

 subquadrifariis, articulis ramorum diametro subduplo, ramulorum sesquilongioribus omnibus e tubulis 

 duodeeim angustis radiantibus formatis. (Tab. CLXXXII. Fig. IV.) 



Hab. Falkland Islands; Mrs. Capt. Sidivan. 



Radix ? Frondes casspitosse, 1 unc. longse, e basi valde fastigiatim ramosse, fiabellatim expansae. Caidis 

 primarius brevissimus, ramos pluiimos capillares repetitim divisos fasciculatos emittens, rami penultimi subpectinati, 

 ultimi curvati patentes, axillis obtusiusculis, supremi ramos ramulosque terminantes arete incurvi sese invicem amplec- 

 tentes, apices frondium hinc nodosi v. incrassati apparent. Color badius. Substantia flaceida, tenax : — chartae 

 adheeret. 



A pretty but small species, allied to the Auckland Islands P. ceratoclada, Mont., but slenderer; with the stem 

 formed of a greater number of tubes, more flaccid, &c. The ultimate ramuli are longer in proportiou than those 

 they spring from, they are slender, patent, rather uniform in length, and curve upwards, hence giving a somewhat 

 pectinated appearance to the ultimate divisions of the frond. The hue, which is pale brown in this specimen, may 

 be somewhat faded, and here and there shows indications of the plant having been originally rose coloured. 



Plate CLXXXII. Fig. IV. — 1, branch and ramuli ; 2, apex of branch : — both magnified. 



6. Polysiphonia microcarpa, Hook. fil. et Harv. ; atro -rubescens, csespitosa, frondibus tenuissimis 

 capillaribus membranaceis flaccidis tenacibus obgosiphoniis equabbus vis attenuatis irregulariter repetitim 

 dichotomis, ramis rammisque erecto-patentibus crebre divisis, articulis bistriatis e tubulis quatuor formatis, 

 ramorum majorum diametro multiplo, minorum triplo quadruplove, ramulorum sesqui duplove longioribus, 



