SPECIES OF ALGVE. 59 



g. Mature spores yellow or orange, 40-42/^ in dia. 2-3 times longer, 



calospora, 209 

 h. Spore-bearing cells not swollen, spores twice as long as wide, 



Hantzschii, 211 

 h. Spore-bearing cells swollen («'). 



/. Mature spore yellow, 42-48/i long . . , Hassallii, 210 



i. " " brown, elliptic, 28yU in diameter . . insignis, 210 



J. One chlorophyll band in each cell {k). 

 J. Two or more " " " " " (v). 

 k. Membrane of spore smooth (/). 

 k. " " " punctate (a). 



/. Mature spore yellow (m). 

 I. " " not yellow (/). 



m. Spore cell slightly swollen on one side, spore oval, twice as 

 long as wide gracilis, 211 



m. Spore cell not swollen (ri). 

 m. Spore cell swollen (<?). 



n. Filaments 20-2 2/< in diameter commimis, 213 



n. " 25-30/i " " lo7igata, 214 



0. Filaments 24-26// in diameter Jurgensii, 213 



0. " 40-43// " " . Lutetiana, 214 



/. Spore-bearing cell decidedly swollen {q). 

 p. " " " not or slightly swollen (r). 



/. " " " swollen on one side only varians, 212 



q. Filaments 24-2^/111x1 diameter . mirabile, 211 



q. " 13-20/* " " . . flavescens, 211 



r. Filaments more than 30/t in diameter (s). 

 r. " 30// or less in diameter (/). 



J. Diameter of filaments 33-4o/<; spores polymorphous, quinina, 213 

 s. " " " 40-55/t; spores polymorphous, 



fusco-atra, 215 

 s. " " " 48-75/;; spores broadly elliptic, 



condensata, 215 

 t. Diameter of filaments 25-30/;; spore twice as long as wide, 



longata, 214 

 /. " " " 22-25/<; spore slightly longer than wide, 



subsalsa, 212 

 M. Mature spore yellow, spore cell much inflated, punctata, 215 



V. Spirals 2 (w). 



V. " 3 {y). 



V. " 4 {ee). 



