ALGH ANTARCTIC. 295 
Forms entangled, stratified tufts. Filaments much inter- 
woven, twice as thick as those of C. simpliciuscula, very irre- 
gularly divided; the branches flexuous, and often naked, but 
here and there set with comb-shaped, involute ramuli, 
something in the manner of C. flexuosa. Colour dark and 
dull. Substance very rigid, when dry, and not adhering in 
the least to paper. 
66. Conferva, simpliciuscula, Hook. fil. et Harv.; filis intri- 
catis incomptis atroviridibus opacis rigidiusculis flexuosis ^ 
capillaribus irregulariter subramosis, ramis valde remotis 
longissimis simplicibus, ramulis perpaucis patentissimis 
filiformibus simplicibus sepe secundis, articulis diametro 
2-3plo longioribus sacculo endochromatis donatis. 
Has. On sea-weeds, stones, and shells, Falklands and Cape 
Horn. 
Forms entangled, dirty green tufts, without gloss. Fila- 
ments an inch or two in length, very distantly and irregularly 
branched, with a few distant ramuli. Allied to C. riparia, 
but more robust; also to C. flagelliformis, Suhr. but the 
habit is very different. It does not adhere to paper. 
67. Conferva ambigua. Hook. fil. et Harv.; filis capillaribus 
rigidulis nigro-viridibus longis fluctuantibus basi adnatis ? 
intertextis simplicibus v. hic illic spurie? ramosis et radi- 
cantibus, nunc processibus lateralibus anastomosantibus 
diametro 2-3plo longioribus opacis sacculo endochromatis 
repletis. 
Has. In the sea, Christmas Harbour, Kerroeksbi 's Lei 
Filaments 4-5 inches long, interwoven at base into a dense 
Stratum, above which the long apices float freely in the 
water. 
68. Conferva angulata, Hook. fil. et Harv.; fluitans vel rep- 
tans, filis simplicibus tenuissimis brevibus strictiusculis hic 
illic incrassatis et angulatis, ad angulum radiculam vel 
ramulum abnormalem emittentibus, articulis diametro 
4-5plo longioribus coloratis, endochromate siccitate con- 
trahente, 
Han, Fresh water, Kerguelen's Land. 
