140 



ZYGNEMATACEAE 



92. Fertile cells cylindric or enlarged 95 



93. Chromatophorcs 3 in each cell 94 



93. Chromatophorcs 3-4, diameter veg- 

 etative cells 35-45 M ^M- ^- flufiatilis 



93. Chromatophorcs 3-4, diameter veg- 

 etative cells 50-60 /J. 134. S. africana 



94. Median spore wall irregularly 



corrugate 136. 5. grossii 



94. Median spore wall granulosc ^i7- ^- ovigera 



95. Median spore wall reticulate, brown, 



diameter spore 42-54 m 129. 5. sttbreticulata 



95. Median spore wall scrobiculate, yel- 

 low, diameter spore 50-65 /^ 13S. 5'. novae-angliae 



96. Zygospores ellipsoid 97 



96. Zygospores ovoid loi 



97. Median spore wall verrucose 98 



97. Median spore wall reticulate 99 



97. Median spore wall pitted, scrobiculate, or punctate 100 



98. Chromatophorcs 4-8, diameter 



spores 89-100 /A 274. S. verrucosa 



98. Chromatophorcs 2-3, diameter 



spores 48-521". 120. S. castanacea 



98. Chromatophorcs 2, diameter 



spores 54-60 iti. 123. 5. braziliensis 



98. Chromatophorcs 5, diameter 



spores 105-120 M 140. S. verruciilosa 



99. Diameter spores 55-66/x, fertile cells 



inflated, chromatophorcs 3-5 131- "^^ hrimnea 



99. Diameter spores 65-83 /x, fertile cells 



cylindric, chromatophorcs 3-4 141. 5. malmeana 



99. Diameter spores 73-90 /x, fertile cells 



cylindric, chromatophorcs 5-10 139. S. anomala 



100. Chromatophorcs 3, diameter 



spores 42--60JU 142. 5'. propria 



100. Chromatophorcs 4-6(-8), diam- 

 eter spores 87-108 /x 143. S. trachycarpa 



luo. Chromatophorcs (3-)4-5(-7)> di- 

 ameter spores 64-74/1 T45. >!>'. pitnctiilata 



loi. Fertile cells cylindric, chromato- 

 phorcs 4 146. 5. cylindrospora 



loi. Fertile cells cylindric or enlarged, 



chromatophorcs 5 140. 5. verruciilosa 



