490 
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. Dark ao brilliant green (often drying pale); nodes not con- 
KEY TO THE HIGHER ALGÆ OF THE ATLANTIC COAST. 
Dull e — adhering to paper; branches few, spreading 
xils; in brackish or fresh waters oe 
Not a as hove) ae loosely tufted sometimes interwoven 
eathery, very slender; pale or bright green, . 
Joints bale about twice—above, 6 to 8 times as tees as Drone U 
Joints uniformly about twice as long as broad; tufts short, 
PODIE Cy es we ee a E E S 
Tufts starry, of a brilliant glossy green dere. in drying, . . 163 
Tufts globose small, yellow-green; on sm . 164 
Joints 6 to 10 times longer than bread: bright rone -mm 
Joints 3 to 5 times longer than broad; sale or ye not 
adhering closely to paper, . 
Joints 2 to 4 times as long as eoki iij adhering tó papei w 
cted; excessively branched, 
Pa ta or glaucous green; nodes mostly obndinoted; 
DEAN branched; ultimate divisions saan pectinate; 
nts uniformly three times as long as broad, 
Labs branche, with longer joints ; main branches long; flexuous, 
almost nake . 167 
Rather aah bentohes ikueved peotinste joints 2 to 4 times as 
long as broa . 169 
Stems long, fetiouk; breiitid long; with short branchlets; aa 
= 
x 
. 166 
joints shorter, 
Pale spores forming sponny tutte nodes slightly constricted x : 
Yellow green; very flexuous; forming silky tu a 
Bright Falon green, fading when dry: branches crowded “ie e 
Full green; branches distant, nearly naked, . eae é 
Joints 3 or more times as vane as broad; . o <5 + e d 
Joints 14 to 3 times as long as broad, 
Joints not longer than broad, grit rather rigid bat collape- ” 198 
ng when drawn from the water, . 176 
Very rigid, glossy green; not adhering to paper; deep water, z 
Mei and flaccid; nodes very long, swollen, pale . 179 T 
Soft and flaccid; adhering closely to paper, >» - eS 
Coarse and rigid, dark green; filaments straight, eee e 
Filaments twisted, very slender but somewhat harsh, - + * ' i 
Mostly floating; joints less than twice as long as broad, «(os 182 
EENE 183 
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Joints twice as broad as T substance rather soft, 
Cell walis thick, . . cou F 
Cell walls thin, a 
In large dark green tufts Ganients thick and tenacious ete 187 
On sa etc., rusty or olivaceous; filaments upright ie pre - 
species, floating in mats in pas ere -a waters : 
iiias in thin strata on mud, > > . : 
