184 ZYGNEMATACEAE 



130. Spirogyra minor (Schmidle) Transeau 1944. Ohio Jour. Sci. 



44, p. 243. Schmidle. Hedwigia. 40, p. 46 (as S. fnal- 



meatia var. minor). 



Vegetative cells 55-60/Li x 150-300/^; 3 (rarely 4) chromatophores; 



conjugation scalariform; tubes formed by both gamctangia; fertile cells 



cylindric; zygospores ellipsoid, 50-60 /j. x 90-1 80 /a; median spore wall 



irregularly reticulate, yellow-brown. 



United States: Indiana (Ben Smith Coll.); Mississippi, Jackson; Texas 

 (Davidson Coll.). 



Brazil; South Africa (Stephens Coll.); China, Szechwan (Li Coll.). 



This species name occurred in two editions of my mimeographed key 

 to this genus where the date was given as 1925. There was no formal pub- 

 lication in a journal until 1944. Between these two dates all the above 

 records accumulated. 



131. Spirogyra brunnea Czurda 1932. Siisswasserfiora Mittel- 



europa. 9, p. 197. Fritsch & Rich. Trans. Roy. Soc. S. 

 Africa. 18, p. 51. 1929 (as S. reinhardii var. africana). 

 Vegetative cells 56-71 /x x 85-280 /a, with plane end walls; 3 to 5 

 chromatophores, making 2 to 3 turns; conjugation scalariform; tubes 

 formed by both gametangia; fertile cells shortened, and slightly inflated 

 on both sides; zygospores ovoid, 55-66 /x x 73-94 /x; median spore wall 

 brown, intricately reticulate. (PI. XXX, Figs. 1-2.) 

 South Africa, Transvaal and Griqualand. 



132. Spirogyra scripta Nygaard 1932. Trans. Roy. Soc. S. Africa. 



20, p. 144, Fig. 48. 



Vegetative cells 51-64/x x 220-300^^, with plane end walls; 4 to 5 

 chromatophores, making about 2 turns; conjugation scalariform; tubes 

 formed by both gametangia; fertile cells inflated to Gy-yi /x, shortened; 

 zygospores ellipsoid, more or less pointed, 54-60 /a x 91-107 m; median 

 spore wall brown, with an intricate pattern of branched, short, dark 

 crevices and corrugations. (PI. XXX, Figs. 3-4.) 



South Africa, Transvaal. 



133. Spirogyra fluviatilis Hilse 1863. In Rabenhorst's Algen Eu- 



ropas, No. 1476. Flora Europaea Algarum. 3, p. 243. 1868. 



Wolle. Freshwater Algae, p. 216, PI. 136, Figs. 1-3. 

 Vegetative cells 30-45^4 x 70-240^1, with plane end walls; 3 to 4 

 chromatophores, making 1.5 to 3.5 turns; conjugation scalariform; 

 tubes formed by both gametangia; fertile cells shortened and inflated to 

 70/1; zygospores ovoid, 47-85 /x x 68-1 i0)u.; median spore wall brown, 

 corrugate, or finely wrinkled. Remarkable branched rhizoids develop 

 from some of the cells. (Fl. XXX, Fig. 5.) 



