ZYGNEMA 43 



88. Zygnema subcylindricum Krieger 1941. Zygnemales. Raben- 



horst's Kryptogamen flora. 13, p. 262. 



Vegetative cells 28-35 /a ^ 54~7i'^5 reproduction by aplanospores 

 only; spores cylindric filling the cells, 29-33 m ^ 55~70^5 median wall 

 brown, granulose and with shallow pits, and 1-2 m irregular sutures. 

 (PL VII, Fig. 13.) 



Germany; Bohemia. 



This is the Z. cylindricum figured by Czurda. It differs from Z. cylin- 

 drtcum Transeau in the granulose markings on the spore wall. 



89. Zygnema irregulare Krieger 1941. Zygnemales. Rabenhorst's 



Kryptogamen flora. 13, p. 263. 



Vegetative cells 40-42 /a x 68-82 ju,; reproduction by aplanospores 

 only; spores cylindric-ovoid with very heavy walls; median wall brown, 

 outwardly finely verrucose, with irregularly and widely separated pits 

 3-6m in diameter and 4-26/i. apart. (PI. VII, Fig. 8.) 



Germany, Mark Brandenburg. 



SPECIES NOT IN PROPER SEQUENCE 



90. Zygnema mucigenum Randhawa 1938. Proc. Indian Acad. 



Sci. 8, p. 141, Fig. 25. 



Vegetative cells 12-14/A x 50-100^1; conjugation both lateral and 

 scalariform; zygospores in one of the gametangia, which is enlarged 

 near the spore; zygospores compressed-globose, 20-22 jia x 30-36^; me- 

 dian spore wall dark blue-green, with scattered punctations; pits 1-1.5^^ 

 in diameter, 3-4M apart. (PI. XLI, Figs. 6-7.) 



India, Fyzabad district, December 15, 1937. 



Should be placed near Number 68. 



91. Zygnema gangeticum Rao 1937. Jour. Indian Bot. Soc. 16, 



p. 270. 



Vegetative cells i6-20iu. x 40-60 /x; conjugation scalariform and lat- 

 eral, zygospores formed in the conjugating tubes and extending into 

 the gametangia; zygospores globose to ovoid, 30-36 /x x 30-45 m; median 

 spore wall yellow-brown and smooth. 



India, United Provinces, Ganges. 



Should be near Number 3. 



92. Zygnema kwangtungense Ley 1944. Sinensia. 15, p. 97. 

 Vegetative cells 38-42 ju. x 25-75 /x; conjugation scalariform; recep- 

 tive gametangia slightly inflated; zygospores globose or subglobose, 

 slightly compressed, 44-61 ju, x 39-72 /a; outer spore wall smooth, trans- 

 parent; median wall 7-iiAc thick, lamellate and foveolate; pits very 



