78 ZYGNEMATACEAE 



Vegetative cells 8-i2/i x 50-200M, with 2 platelike chromatophores 

 each containing i or 2 pyrenoids; reproduction by zygospores and 

 aplanospores; conjugation scalariform; gametangia genuflexed and sep- 

 arating after conjugation; zygospores globose to polyhedric-ovoid, 

 26-33 /A in diameter, completely filling the tubes; outer spore wall thick 

 lamellate; median spore wall golden yellow, smooth; inner spore wall 

 moderately thick, hyaline, irregularly scrobiculate within; aplanospores 

 obliquely rotund-fusiform, 24 ^t x 42-54/1. (PI. XII, Figs. 24-26.) 



China, northwestern Yunnan on sinter terraces at an altitude of 2,765 

 meters, October 4, 1914. 



