136 ZYGNEMATACEAE 



57. Spore diameters less than 60 /x 58 



57. Spore diameters greater than 60 /x 59 



58. Chromatophores 2 to 3, spores 



57-5S/X X 69-71 /M Tl- ^- tvdwitschii 



58. Chromatophores 4, spores about 



50M X 75-100 /i. "]%. S. parvispora 



59. Chromatophores 3 to 4, spores 63-68 /^ 



X 120-140 /x 79- '^'- titrjosa 



59. Chromatophores (2-3)4, spores 57- 



68m X 100-21GJLC 98. 5. szechwanensis 



59. Chromatophores 3 to 5, spores 60-80 /x 



X 90-1 70 /x 80. 5. nitida 



60. Chromatophores (2-) 3 (-4), di- 

 ameter vegetative cells 86-92^. . . 81, S. hymerae 

 60. Chromatophores 4, diameter veg- 

 etative cells 90-1 15 /x 82. 5. setiformis 



60. Chromatophores 4-6, diameter 



vegetative cells 1 15-128 /x 83. 5. elliptica 



60. Chromatophores 6-8, diameter 



vegetative cells 90-100 jtx 84. 5. wollnyi 



60. Chromatophores 6-8, diameter 



vegetative cells 98-1 10 ju 86. 5. yiinnanensis 



61. Diameter vegetative cells 115-128^, 



chromatophores 6-8 87. 5. hatillensis 



61. Diameter vegetative cells 125-150 /x, 



chromatophores 3 to 8 88. 5. ellipsospora 



61. Diameter vegetative cells i58-i66,u, 



chromatophores 5 to 6 89. vS. splendida 



62. Vegetative cells less than 60 /x in diameter 63 



62. Vegetative cells more than 60/^1 in diameter 68 



63. Chromatophores 3 or less in each cell 64 



63. Chromatophores 4 to 5, diameter veg- 

 etative cells 50-60 /x 90. 5. emilianensis 



64. Vegetative cells with 2 chromatophores 65 



64. Vegetative cells with \ chromatophores 66 



64. Vegetative cells with 2 or ^ chromatophores (rarely i in 



No. 41 ) 67 



65. Diameter vegetative cells 27-30 /x, ster- 

 ile cells inflated to 50/x 91. 5. exilis 



65. Diameter vegetative cells 48-52 /x, ster- 

 ile cells inflated to 75/x 92. 5. distenta 



