154 ALGE OF MAURITIUS. 
“from filamentous” to nearly a line broad, branches long 
and often again much divided, their apices frequently 
bare of ramuli, below densely set with patent, hair-like, 
quadrifarious, sub-simple or forked ramuli. Fucus 
Valentie (Turn. T. 18.) comes near this variety. 
à. nuda; fronde filiformi setacea, ramis intricatis, ramulis 
paucis simplicibus. 
More intricately branched and with fewer ramuli 
than the last. 
s. intricata. Intermediate between the two last. 
%. pumila; fronde crinali minuta intricata densissime 
cespitosa, ramulis quadrifariis simplicibus. 
This variety forms intricate strata, about an inch or 
lessin height. The frondsare filamentous, much branch- 
ed, and set with spine-like ramuli. 
n. muscoides; fronde filiformi, ramis elongatis curvatis 
apice uncinatis nudiusculisque, ramulis distichis paten- 
tibus setaceis. 
This variety is typified by Turner's Fucus musciformis, 
of which the plate, ( 7. 127,) is admirably expressive. 
6. flexuosa; fronde filiformi intricata crassa, ramis elon- 
gatis valdé flexuosis apice sæpè involutis, ramulis elon- 
gatis secundis. 
More flexuose than the last, with more elongated 
ramuli. : 
1. nigra; fronde filiformi intricata, ramis flexuosis nudis 
hic illic ramulosis. 
Slenderer and of a darker colour than the last, with 
fewer ramuli. 
x. fasciculata; fronde filiformi, ramis elongatis inferné 
nudis, superné ramossissimis, ramulis fasiculatis. 
A. cornuta; fronde filiformi subcompressa densissime in- 
tricata pumila, ramis patentibus ramulosis, ramulis 
conicis spinzeformibus. 
Stem i—1 inch high, forming dense strata, much 
branched, compressed, about a quarter of aline in dia- 
meter; branches alternate, spreading; colour very dark. 
