1 86 ZYGNEMATACEAE 



137. Spirocyra ovigera Montague 1850. Afi?i. set. nat. p. 305. 



Sylloge generum specierumque, Paris, p. 463. 1856. 



Vegetative cells 38-42 /u. x 60-280/1, with plane end walls; 3 chro- 

 matophores, making 2 to 3 turns in the cell; conjugation scalariform; 

 tubes formed by both gametangia; fertile cells inflated; zygospores 

 ovoid, sometimes nearly ellipsoid, 45-52 /x x 75-100 m; median spore wall 

 granulose, brown. 



United States: Texas (Davidson Coll.). 



South America, French Guiana. 



138. Spirogyra novae-angliae Transeau 1915. Ohio Jour. Sci. 



16, p. 26. 



Vegetative cells 48-60 /a x 150-390/'-, with plane end walls; 3 to 5 

 chromatophores, making 2.5 to 4.5 turns; conjugation scalariform; 

 fertile cells cyHndric or enlarged; tubes formed by both gametangia; 

 zygospores ovoid, 50-65/1 x 70-120 /a; median spore wall yellow, retic- 

 ulate and finely punctate. (PI. XXX, Fig. 7.) 



United States: Iowa and Wisconsin to Louisiana, and eastward 10 

 Massachusetts. 



139. Spirogyra anomala Rao 1937. Jour. India?! Bot. Soc. 16, 



p. 285. 



Vegetative cells 108-125/1 x 72-165/1, with plane end walls; chro- 

 matophores 5 to 10; conjugation scalariform; tubes formed by both 

 gametangia; fertile cells cylindric; zygospores ellipsoid, more or less 

 pointed, 73-90/t x io8-i38(-i65)/i; median wall thick, brown, and 

 finely reticulate. 



India: Sarnath, U.P. 



140. Spirogyra verruculosa Jao 1936. Amer. Jour. Bot. 23, p. 58. 



Vegetative cells 105-120/1. x 259-420 /t, with plane end walls; 5 chro- 

 matophores, making 2 to 5 turns; conjugation scalariform; tubes formed 

 by both gametangia; fertile cells cylindric or slightly enlarged; zygo- 

 spores eUipsoid to ovoid, 1 05-1 20/1 x 168-220 /a; median spore wall dark 

 brown, distinctly verrucose. (PI. XXX, Figs. 8-10.) 



China, Mangchovv, June, 1929. 



141. Spirogyra malmeana Hirn 1896. Wittrock and Nordstcdt 



Algae Exsiccatae, No. 1375. 



Vegetative cells 76-91 /t x 160-300/1, with plane end walls; 3 to 4 

 chromatophores, making 1.5 to 4 turns; conjugation scalariform; tubes 

 formed by both gametangia; fertile cells cylindric; zygospores ellipsoid, 



