98 ZYGNEMATACEAE 



36. MouGEOTiA GLOBULispoRA Jao 1935. Sifiefjsia. 6, p, 578. 

 V'egetative cells 19-32 /x x 96-228^1; chromatophore with 10-12 pyrc- 



noids in a single row; conjugation scalariform; zygospores in the con- 

 jugating tubes, globose to subglobose, ^2-38.4 /i x 32-35 m; spore wall 

 yellow-brown at maturity, finely and closely scrobiculate. (PI. XV, 

 Figs. 15-16.) 



China, Chungking, February, 1932, and January, 1933; Puerto Rico. 



37. MouGEOTiA PULCHELLA Wittrock 1871. Hcdwigia (1871), p. 88. 

 Vegetative cells 24-29 /a x 48-1 50 ju.; chromatophores with 4-8 pyre- 



noids in a row; conjugation scalariform; zygospores in the conjugating 

 tubes, ovoid to ellipsoid, with ends more or less flattened, 28-35/1 x 

 40-50 m; spore wall yellow-brown, punctate. (PI. XVI, Fig. i.) 



United States: Minnesota; Michigan; Indiana. 



Sweden; Latvia; Finland; Germany; China, Kiangsi. 



38. MouGEOTiA LAEvis (Kutzing) Archer 1866. Quart. Jour. 



Micros. Soc. 6, p. 272, and 7, PI. 8, Figs. 1-3. Kiitzing. 



Species A I gar urn, p. 447. 1849. 



Vegetative cells 20-36^ x 20-100 /j,; chromatophores with 2 to 4 



pyrenoids in a row; conjugation scalariform; zygospores ellipsoid to 



ovoid, 20-36 /A X 35-50/4; wall scrobiculate; pits about 3/^ in diameter, 



2-3/1 apart. (PI. XV, Fig. 17.) 



United States: Wisconsin (G. M. Smith Coll.). 



England and Finland to Poland; Yugoslavia; North Africa. 



39. MouGEOTiA ROBUSTA (dc Bary) Wittrock 1885. Wittrock and 



Nordstedt Algae Exsiccatae, No. 651. 



Vegetative cells 25-33/1 x 75-260 /(.; chromatophores with 10-20 

 scattered pyrenoids; conjugation scalariform; zygospores in conjugating 

 tubes, ovoid to subglobose, 35-41 /i x 47-58/'; spore wall brown, scrobic- 

 ulate; pits 1-1.6/A in diameter, scattered. (PI. XVI, Figs. 2-4.) 



United States: Iowa; Michigan; Illinois; eastward to Massachusetts and 

 New lersey. 



France; Germany; Sweden; Finland; Latvia; Ceylon; Japan; North 

 Africa. 



Filaments with chromatophores having V-shaped ends or divided all 

 the way to the nucleus are not uncommon in some collections. These chro- 

 matophores have sometimes been described as "double," or as 2 separate 

 chromatophores. 



40. MouGEOTiA DAYTONAE Transcau 1934. Trans. Amer. Micros. 



Soc. 53, p. 219, Fig. 55. 

 Vegetative cells 32-36/i x 100-250/1; chromatophores with numcr- 



