54 ZYGNEMATACEAE 



scrobiculate, usually hidden by layer of yellow-brown granules between 

 the outer and median walls. (PI. VIII, Figs. 18-21.) 



United States: Michigan, Douglas Lake region; Wisconsin, Madison. 



Canada, Ontario (A. B. Klugh Coll.). 



9. Zygnemopsis tiffaniana Transeau 1944. Ohio Jour. Sci. 44, 

 p. 244. Formerly listed as Debarya cruciata and Z. cruciata 

 Price (191 1). 



Vegetative cells io-i2;u. x 30-60/^; chromatophore with 2 pyrenoids; 

 conjugation scalariform; zygospores formed n\ the broad conjugating 

 tubes and extending into both gametangia; spores quadrangular with 

 concave or rarely straight sides, angles produced or slightly concave, 

 20-24/x X 28-32^; median spore wall yellow, punctate. (PI. VIII, 

 Figs. 22-23.) 



United States: Florida (Tiffany Coll.); Oklahoma (Taft Coll.). 



Canada, British Columbia (Wailes Coll.). 



Named for Hanford L. Tiffany of Northwestern University, author of 

 The Oedogoniaceae and Algae, the Grass of many Waters. 



In 1932 there was but one incompletely described species with approx- 

 imately these dimensions. Now there are several with mature spores and 

 it is impossible to say which species Price had in 1911. The American col- 

 lections are clearly representatives of a single species, and not necessarily 

 "Z, cruciata." 



10. Zygnemopsis sinensis Transeau 1934. Trails. Amer. Micros. 



Soc. 53, p. 215, Fig. 22. 



Vegetative cells 10-13JU. x 29-72/.S with 2 more or less elongate, 

 stellate chromatophores; conjugation scalariform; zygospores formed 

 in the broad conjugating tubes and extending far into both gametangia; 

 spores quadrate-ovoid, 29-32 /a x 29-36 /a; median spore wall yellow, 

 scrobiculate; pits 2-2.5 /u, ^^ diameter, 2.5-3 /a apart. (PI. VIII, Fig. 24.) 



China, Wuchang, Hupeh (Li Coll.). 



11. Zygnemopsis indica Randhawa 1937. Proc. Indian Acad. Sci. 



5, p. 297, Fig. I. Also as Ghosella indica. 1934. 



Vegetative cells 10-15/^ x 50-75/^., with 2 rounded or stellate chro- 

 matophores, each with a central pyrcnoid; reproduction by zygospores, 

 parthenospores, and aplanospores; conjugation scalariform; zygospores 

 compressed-cjuadrangular-ovoid or compressed-globose, 34-46/ii x 40- 

 53/A; median wall yellow-brown, smooth or undulate, with abundant 

 granules between the outer and median walls; aplanospores and par- 

 thenospores with similar walls, 20-26/^1 x 40-46/Li, in sporangia to 8om 

 in length. (PI. VIII, Figs. 26-27.) 



India, Punjab near Hamira, February to April, 1930. 



