266 ALGÆ ANTARCTIC. 
sembles P. formosa, Suhr, but differs in the form and size of 
the capsules. 
38. Polysiphonia abscissa, nobis; coccinea, frondibus tenuibus 
membranaceo-gelatinosis flaccidis tenacibus oligosiphoniis, 
caule primario parum diviso, divisuris frondem percurren- 
tibus, ramis secundariis alternis multifidis circumscriptione 
obovatis, minoribus alternis erectis subdichotome divisis, 
ramulis apice multifidis fastigiatis (quasi abscissis) fibrilli- 
feris, articulis ramorum diametro 4-6 plo, ramulorum 2-3 
plo longioribus bistriatis, keramidiis pusillis ovatis breve 
pedicellatis. 
Has. Cape Horn. 
Filaments 3-4 inches long, purplish rose-coloured or nearly 
crimson, with a principal stem and branches. The ramuli 
remarkably fastigiate, Nearly related to P. microcarpa, but 
the branching is more regular and the colour different. 
39. Polysiphonia .tenuistriata, nobis; rubescens articulata 
multistriata, frondibus gracillimis tenuissimis flaccidis elon- 
gatis, caule subsimplici flexuoso, ramis distantibus decom- 
positis circumscriptione ovatis, ramificatione irregulariter 
dichotoma, ramis ramulisque sensim attenuatis apice 
fibrillosis, axillis erecto-patentibus acutis, articulis ramo- 
rum diametro multuplo, ramulorum 2-3 plo longioribus 
sexstriatis, e tubulis duodecim tenuissimis radiantibus 
coloratis formatis, ad genicula incrassatis. 
Has. Cape Horn, in deep water. 
4-6 inches long, capillary, subsolitary (not tufted ?), grow- 
ing on the larger Alge. Allied to P. anisogona, but much 
more slender, and not fragile when moistened after having 
been dried: besides the differences in ramification. = 
40. Polysiphonia flabelliformis, nobis; pusilla setacea badia 
rigidula, fronde brevi basi simplici stipiteformi apice flabel- 
latim ramosa, ramis irregulariter dichotomis multifidis 
apice subfastigiatis, ramulis ultimis erectis longe simplici- 
bus, axillis angustis, articulis multistriatis, inferioribus 
diametro multuplo superioribus sesquilongioribus. 
Has. On Macrocystis pyrifera, off the Crozets. 
