222 ZYGNEMATACEAE 



269. Spirogyra iNDicA Kficgcr 1944. Rabenhorst's Kryptogamen- 



flora. 13, p. 317. 



Vegetative cells 36-42^ x iio-152/i, with plane end walls and i 

 chromatophore; conjugating tubes formed by both gametangia; conju- 

 gation mostly lateral, less frequently scalariform; receptive gametangia 

 cylindric; zygospores ovoid, 33-^S/x x 40-62 /a; median spore wall thick, 

 smooth, and brown. (PI. XLI, Figs. 20-21.) 



India, Central Provinces; South America, south Chile. 



270. Spirogyra czurdae Misra 1937. Proc. Indian Acad. Sci. 5, 



p. 115, Fig. 3. 



Vegetative cells 26-28 m x 52-78 /a, with plane end walls and i chro- 

 matophore; conjugation scalariform; tubes formed by both gametangia; 

 receptive gametangia shortened and enlarged; zygospores globose, 

 ^^-54/^ in diameter; median spore wall very thick, brown, and scrobic- 

 ulate; pits 3-4 /j. in diameter. (PI. XLI, Figs. lo-ii.) 



India, Kashmir. 



271. Spirogyra sibirica Skvortzof 1927. ]oHr. Bot. 65, p. 252, 



Fig. I. 



Vegetative cells about 17/1 broad, with plane end walls and i chro- 

 matophore; conjugation scalariform; tubes formed by male cells; recep- 

 tive gametangia inflated slightly on the inner side; many sterile cells 

 bullate; zygospores ellipsoid, 20 /a x 32-40 /a; median spore wall yellow, 

 scrobiculate. (PI. XLI, Figs. 8-9.) 



Russia, Western Altai Mountains, Zaisan district. 



272. Spirogyra atasiana Czurda 1939. Arch. f. Hydrobiol. Suppl. 



Bd. 16, p. 417, PI. I, Fig. 3. 



Vegetative cells 44-48 /x x 92-161 m, with plane end walls and i chro- 

 matophore; conjugation scalariform; tubes formed apparently by the 

 male gametangia; receptive gametangia cylindric; zygospores ovoid, 

 41-45/ji X 50-90 /t; median spore wall thick, yellow-brown, outer surface 

 granulose. 



Sumatra, Danau di Atas. 



273. Spirogyra pseudoreticulata Kriegcr 1944. Rabenhorst's 



Kryptogamen flora. 13, p. 400. 



Vegetative cells 20-25 /x x 75-170 ^n, with plane end walls and 2 chro- 

 matophores; conjugation lateral and scalariform; tubes formed by both 

 cells; receptive gametangia enlarged; zygospores ellipsoid, 30-33 m x 

 64-68 A^; median spore wall brown, with rather fine, irregular, reticulate 

 ridges. (PI. XLI, Figs. 13-15.) 



Brazil, Sao Paulo. 



