SPIROGYRA 209 



iform; tubes formed by both gametangia; fertile cells shortened and 

 enlarged to 32 /t; zygospores ellipsoid, 28-31^0, x 42-62 /a; median spore 

 wall punctate to reticulate-punctate, brown. (PI. XXXVI, Fig. 21.) 



United States: Massachusetts, Wellfleet (BuUard Coll.). 



Africa, Langenburg, Lake Nyassa. 



In the original collection attached and forming long masses in flowing 

 water. 



222. Spirogyra dentireticulata Jao 1935. Sinensia. 6, p. 611, 



PL 10, Figs. 1 14-15. 



Vegetative cells i8-26;«. x 118-250^1, with rephcate end walls; i 

 chromatophore, making 2 to 7 turns; conjugation scalariform; tubes 

 formed by both gametangia; zygospores ellipsoid, 29-41/11 x 42-80 /.a; 

 median spore wall reticulate, with minute spines at the intersections of 

 the network, yellow at maturity. (PI. XXXVI, Figs. 17-18.) 



United States: Tennessee, Rutherford County (Bold Coll.). 



China, Szechwan, December and lanuary. 



223. Spirogyra lambertiana Transeau 1934. Trans. Amer. Micros. 



Soc. 53, p. 225, PL 21, Fig. 60. 



Vegetative cells i^-'Tpix x 120-300 /a, with replicate end walls; i 

 chromatophore, making 3.5 to 7 turns in the cell; conjugation lateral 

 and scalariform; tubes formed by both gametangia; fertile cells fusi- 

 form, inflated to 58-65 (-78) ju,; zygospores ellipsoid, 34-43 /a x 72-90 /a; 

 median spore wall of 2 layers; outer, thin, yellow, wrinkled; inner, 

 thick, yellow, or yellow-brown, reticulate. (PL XXXVII, Fig. i.) 



United States: Maine; Massachusetts. 



India, Fyzabad, February, 1938. 



See also Number 262. 



224. Spirogyra microgranulata Jao 1935. Sinensia. 6, p. 612, 



PL 10, Figs. 1 12-13. 



Vegetative cells 16-19^'' x 154-420/A, with replicate end walls; i 

 chromatophore, making 4.5 to 8 turns in the cell, conjugation scalar- 

 iform; tubes formed by both gametangia; receptive gametangia en- 

 larged; zygospores ovoid, 24-36 /a x 5 1-77 /J', with a double colorless 

 outer wall, of which the inner layer is wrinkled; median wall granulate 

 to verrucose, yellow-brown at maturity. (PL XXXVII, Figs. 2-3.) 



China, Szechwan. 



225. Spirogyra laxistrata Jao 1935. Sinensia. 6, p. 611, PL 10, 



Fig. III. 

 Vegetative cells 18-20/A x 112-147/A, with replicate end walls; i 

 chromatophore, making 2.5 to 4 turns; conjugation scalariform; tubes 



