SPIROGYRA 187 



65-83 /x X 75-1 00 /x; median spore wall yellow-brown, irregularly retic- 

 ulate. (PI. XXX, Figs. 14-16.) 

 Brazil, Mato Grosso, May, 1894. 



142. Spirogyra propria Transeau 1915. Ohio Jour. Sci. 16, p. 25. 

 Vegetative cells 60-68 /x x 80-150)11, with plane end walls; 3 chro- 



matophores, making .5 to i turn; conjugation lateral; tubes formed by 

 both gametangia; fertile cells cylindric; zygospores ellipsoid, 42-60 |U x 

 80-120^; median spore wall irregularly pitted, yellow-brown. 



United States: Illinois; Kentucky (Mclnteer Coll.). 



In the collections seen the spores were uniformly oriented diagonally in 

 the short receptive gametangia. 



143. Spirogyra trachycarpa Skuja 1932. Acta Horti Bot. Univ. 



Latviensis. 7, p. 63, Fig. 82. 



Vegetative cells 1 10-123 /a x i 10-500 /x, with plane end walls; 4 to 

 6(-8) chromatophores, making i to 2.5 turns; conjugation scalariform; 

 tubes formed by both gametangia; fertile cells inflated on the inner 

 side; male gametangia 87-1 76 /x long, female, 1 19-252 /x; zygospores 

 broadly ellipsoid, 87-108 /x x ii7-i72(-204)/x; median spore wall thick, 

 irregularly scrobiculate, color not given; outer spore wall thick, hyaline. 



Latvia, 



144. Spirogyra ghosei Singh 1938. Jour. Indian Bot. Soc. 17, 



p. 382. 



Vegetative cells 100-105 ju, ^ 225-390 /x, with plane end walls; chro- 

 matophores 6 to 7; conjugation scalariform; tubes formed by both gam- 

 etangia; fertile cells cylindric; zygospores ovoid, 90-103 /x x 105-120 /x; 

 median spore wall thick, brown and closely reticulate. (PI. XXV, 

 Fig. 12.) 



India, U.P., Gorakhpur, November 8, 1937. 



145. Spirogyra punctulata Jao 1936. Amer. Jour. Bot. 23, p. 57, 



Figs. 13-14. 



Vegetative cells 70-83^ x 105-315)^, with plane end walls; filaments 

 usually curved; 3 to 7 chromatophores, making .5 to 1.5 turns; con- 

 jugation scalariform; tubes formed by both gametangia; fertile cells 

 cylindric; zygospores ellipsoid with pointed ends, 64-74 /x ^ 83~i79/^; 

 median spore wall thick, finely punctate, and yellow at maturity. (PI. 

 XXX, Figs. 11-13.) 



China, Poatin, August, 1929. 



Jao in 1939 described a variety macrospora, with 4 chromatophores and 

 thicker spores. 



