MOUGEOTIA 99 



ous scattered pyrenoids; conjugation scalariform; zygospores in the 

 conjugating tube, globose, 40-45 i^, in diameter, or subglobose, 39-42 /a x 

 45-50 /x; spore wall yellow, coarsely and irregularly punctate; pits about 

 i.5jU, in diameter and about the same distance apart. (In the specimens 

 seen the wall is also irregularly contracted and reticulate-wrinkled.) 

 (PI. XVI, Fig. 5.) 



United States: Florida, Daytona (Tiffany Coll.). 



41. MouGEOTiA HANDELii Skuja 1937. Symbolue Sinicae. 1, p. 83, 



Fig. II. 



Vegetative cells about 35/^ x 70-1 75 /u,; chromatophore platelike, 

 with 8-14 scattered pyrenoids; conjugation scalariform; zygospores 

 globose, 40-42 /x in diameter; spore wall olive-brown, scrobiculate on the 

 inner side. (PI. XVI, Fig. 6.) 



China, Yiinnanfu, altitude 5,800 feet, February 20, 1914. 



42. MouGEOTiA SANFORDIANA Tiffany 1934. Trans. Amer. Micros. 



Soc. 53, p. 219, Fig. 58. 



Vegetative cells 33-38 /x x 1 00-250 ai; chromatophores with numer- 

 ous scattered pyrenoids; conjugation scalariform; zygospores in the 

 conjugating tube, globose, 63-68 /x in diameter, or subglobose, 54-65 m x 

 65-72 /a; spore wall yellow, scrobiculate; pits 2-3^11 in diameter and 

 about the same distance apart. (PI. XVI, Fig. 7.) 



United States: Florida, Daytona (Tiffany Coll.). 



43. MouGEOTiA OBLONGATA Transeau 1934. Traits. Amer. Micros. 



Soc. 53, p. 219, Fig. 38. 



Vegetative cells 14-22)". x 80-200 )tx; chromatophore with 6-i2(-i6) 

 pyrenoids in a single row; conjugation scalariform, often connecting 

 several filaments; zygospores in the conjugating tubes, usually bilobate- 

 ovoid, sometimes more cylindric with concave sides, 28-36 ju. x 47-58 /x; 

 spore wall yellow, sometimes finely punctate. (PI. XVI, Fig. 8.) 



United States: Florida, Fort Myers (Tiffany Coll.). 



This species is the first of 6 species having cylindric spores with concave 

 lateral walls. M. opelousensis has round pillbox-shaped spores and is the 

 culmination of this series of spore forms. 



44. MouGEOTiA VARiANS (Wittrock) Czurda 1932. SUsswasserflora 



Mitteleuropa. 9, p. 79. 

 Vegetative cells 25-27111; chloroplasts with numerous scattered pyre- 

 noids; conjugation scalariform; zygospores in the conjugating tubes, 

 extending into or across the gametangia, cylindric-ovoid, usually with 

 concave sides, ends convex, 48-60 /x x 64-78 ju,; spore wall yellow-brown, 

 smooth; sporangia adjoined by 2, 3, or 4 cell remnants. (PI. XVI, 

 Fig. 12.) 



