Apparently very distinct from any hitherto described species : its remarkable characters are its wavy habit, and the great length and simplicity of the upper branches, which are furnished with more or fewer, short, patent, secund ramuli.
Plate CXCIII. Fir/. I. — 1, plant of the natural size ; 2, branch and ramuli ; 3, apex of branch ; 4, portion of ditto : — very highly magnified.
6. Cladophora incompta, Hook. fil. et Harv.; fills intricatis incomptis atro-viridibus opacis rigidis setaceis tortuosis vix ramosis, ramis longe nudis v. ramulis brevibus pectinatis circinato-inflexis ornatis, ramulis ultimis secundis v. alternis patentissirnis obtusis approximatis rernotisve, articulis diarnetro brevioribus quadratis v. -£ longioribus. Nobis in Lond. Joum. Bot. vol. iv. p. 294. (Tab. CXCII. Fig. III.)
Hab. Hermite Island, Cape Horn ; in the sea.
Cmspites intertexti, horizontaliter extensi, atro-olivacei, rigidi. Fila intricata, irregulariter parce ramosa, latiuscula, C. simpliciusculis diametro duplo excedentia. Rami flexuosi, saepe nudi, non raro ramulis involutis pectinatis obsiti, ut in C.flexuosa. Color luride ater v. virescens, opacus. Substantia siccitate rigida: — charts minime adhaeret. Plate CXCII. Fig. III. — 1, plant of the natural size ; 2, portion of ditto, highly magnified, with abbreviated ramuli ; 3, another portion of ditto and branch : — still more highly magnified.
7. Cladophora simpliciuscula, Hook. fil. et Harv.; fills intricatis incomptis atro-viridibus opacis flexuosis rigidiusculis capillaribus irregulariter subramosis, ramis valde remotis elongatis simplicibus, ramulis perpaucis patentissirnis filiformibus ssepe secundis articulis diametro sequalibus v. |-2 plo longioribus, sacculum endochromatis intus foventibus. Nobis in Lond. Joum. Bot. vol. iv. p. 295. (Tab. CXCII. Fig. IV.)
Hab. Hermite Island, Cape Horn, and the Falkland Islands ; on sea-weeds, stones, and shells.
Ccespiles intertexti, opaci, luride virides, subhorizontaliter extensi. Fila 1-2 unc. longa, remote et irregulariter ramosa; rami ramulis perpaucis aucti : — charts; non adhagret.
Allied to C. riparia, but more robust, also near the C.fiagelliformis of the Cape of Good Hope, but with a very different habit from that plant.
Plate CXCII. Fig. IV. — 1, plant of the natural size ; 2, portion of thread and branch ; 3, cells of ditto : — very highly magnified.
8. Cladophora glaucescens, Griff. ? Harv. Manual, p. 139.
Hab. Hermite Island, Cape Horn ; rare.
We are not at all satisfied with the reference of the Antarctic plant to the British C. glaucescens, which has slenderer filaments. The specimens resemble that species more nearly than any other, and are not in a sufficiently good state for a proper comparison.
48. OSCLLLATORIA, Fauch.
1. OsciLLATORiA_p«p«m/, Hook. fil. et Harv.; strato gelatinoso tenaci siccitate translucente purpureo, fills violaceis omnium tenuissimis dense intertextis curvatis longe radiantibus, striis inconspicuis. Nobis in Lond. Joum. Bot. vol. iv. p. 297.
Hab. Kerguelen's Land; in alpine rivulets, alt. 300-700 feet.
Species admodum singularis, Lyngbyce prolific^, Grev. (Scot. Crypt. Flor. t. 303,) plerisque notis affinis, nee
