ZYGNEMA 29 



27. Zygnema gorAkhporense Singh 1938. ]our. Indian Bot. Soc. 



17, p. 370. 



Vegetative cells ^^-^yii x 66-83;".; conjugation scalariform; zygo- 

 spores formed in the tubes and extending into the gametangia; zygo- 

 spores ovoid to globose, 30-36 /a x 36-43/1; median wall blue, scrobic- 

 ulate; pits about 4/* in diameter and 1-31". apart. 



India, Gorakhpur, October 8, 1936. 



28. Zygnema ma jus Czurda 1932. Siisswasserftora Mitteleuropa. 



9, p. 106. Fritsch & Rich. Trans. Roy. Soc. S. Africa, 9, 

 p. 56. 1921. 

 Vegetative cells 27-30/1. x 27-90 /a; conjugation scalariform; zygo- 

 spores formed in the conjugating tubes, globose to ovoid, 33-48 /a x 

 42-50 /a; median spore wall blue, smooth. 

 Africa, Transkei Territory. 



29. Zygnema kiangsiense Li 1938. Bull. Fan Mem. Inst. Biol. 



8, p. 94. 



Vegetative cells 32-38 /a x 36-50 /a; conjugation scalariform; zygo- 

 spores formed in the conjugating tubes, ovoid to subglobose, 36-46 /a x 

 44-58 /a; median spore wall blue, coarsely scrobiculate; pits 3-5 /^ in 

 diameter, 4-7 /a apart. (PI. IV, Fig. 5.) 



China, Kiangsi. 



30. Zygnema ralfsii (Flassall) de Bary 1858. Untersuchungen 



Uber die Familie der Conjugaten, p. 77. 



Vegetative cells 14-20 /a x 38-80 /j^; conjugation scalariform; zygo- 

 spores formed in the conjugating tubes, 15-25 /a x 25-35 /a; median spore 

 wall brown, smooth. (PL IV, Fig. 6.) 



United States: Pennsylvania, Harrisburg (Wolle). 



British Isles and continental Europe. 



31. Zygnema micropunctatum Transeau 1934. Trans. Amer. 



Micros. Soc. 53, p. 210, PL 17, Fig. 13. 



Vegetative cells i4-i6a<. x 24-52 /a; conjugation scalariform; zygo- 

 spores formed in the greatly enlarged conjugating tubes, compressed- 

 globose, with the longer diameter at right angles to the conjugating 

 tube, 28-32 /A X 36-40 /J.; median spore wall yellow-brown, minutely and 

 densely punctate. (PL IV, Fig. 7.) 



United States: Michigan; Oklahoma. 



32. Zygnema momoniense W. West 1892. Jour. Linn. Soc. of 



London Bot. 29, p. 114, PI. 24, Fig. 26. 

 Vegetative cells 20-22 ij^ in diameter; conjugation scalariform; zygo- 



