96 ZYGNEMATACEAE 



27. MouGEOTiA MECAspoRA Wittrock 1 872. Bill. Kgl. SvensJ{ 



Vetensk,- Akad. Handl. 1 (i). 



Vegetative cells 17-21 /x. x 170-380 /x; conjugation scalariform; zygo- 

 spores in the conjugating tube, globose, 40-50/i, or ovoid, 41-44/i. x 

 45-48/i; spore wall brown, irregularly scrobiculate. (PI. XV, Fig. 5.) 



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



Sweden. 



28. MouGEOTiA ORNATA Jao 1935. Sincnsiu. 6, p. 577, Figs. 34-35. 

 Vegetative cells 16-22 )u. x 76-176 /x; chromatophores with 4-10, 



usually 6, pyrenoids in a single row; gametangia straight; conjugation 

 scalariform; zygospores in the conjugating tubes, globose to subglobose, 

 28-35 M '" diameter; spore wall thick, more or less regularly and dis- 

 tinctly punctate, with a prominent, ridged suture; margin of ridge 

 finely undulate; yellowish-brown at maturity. (PI. XV, Figs. 6-7.) 



China, Szechwan. Collection of C. C. Jao, Herbarium, University of 

 Michigan, No. S587. 



29. MouGEOTiA MicROPORA Taft 1934. Trans. Amer. Micros. Soc. 



53, p. 218, Fig. 62. 



Vegetative cells 18-23/t x 60-160 /x; chromatophores with 4-6 pyre- 

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

 tube, globose to ovoid, or rarely slightly compressed-ovoid, 26-36 m x 

 26-30 /x; outer sporangium wall a pectic layer 5-12 /a in thickness; spore 

 wall brown, distinctly punctate; pores .5-1 m in diameter. (PI. XV, 

 Fig. 8.) 



United States: Oklahoma; Michigan; Florida. 



30. MouGEOTiA AREOLATA Traiiscau 1934. Trans. Amer. Micros. 



Soc. 53, p. 219, Figs. 47-49. 



Vegetative cells 17-26 /x x 90-400 /n; cross walls more refractive than 

 lateral walls and slightly colligate; chromatophores with 4-10 pyrenoids 

 in a row, occupying from two-thirds to one-fourth the cell length; con- 

 jugation scalariform; zygospores in the conjugating tubes, dolioform, 

 with the ends short or extended, 43-50^ x 50-70^1; wall frequently in 

 3 layers, the outer a thin, yellow, minutely punctate membrane, the 

 second a heavy, yellow areolate wall with a prominent equatorial ridge 

 and suture, the innermost wall thin and hyaline; aplanospores asym- 

 metrically ovoid, 27-33 /x X 55-66 /x, markings similar to those of the 

 zygospores. (PI. XV, Figs. 9-1 1.) 



United States: Florida, Oveida Springs (O'Neil Coll.). 



31. MouGEOTiA suMATRANA Schmidle 1895. Hedwigia. 34, p. 297. 

 Vegetative cells 20-24 /x ^ 80-220 /x; chromatophore with scattered 



