MOUGEOTIA 105 



aplanospores occupying the middle part of the cell; obliquely ovoid, 

 24-30 /J. X 32-48 Ai. (PI. XVII, Fig. 21.) 



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



In Florida the 3 foregoing species were all found in the same pond. In 

 none of the specimens studied was interspecific conjugation observed. 



63. MouGEOTiA CAiMANi Transcau 1938. Amer. Jour. Bot. 25, 



p. 525, Fig. 2. 



Vegetative cells 4-5 m x 60-100 /x; chromatophores with 2-8 pyre- 

 noids in a single row; conjugation scalariform; zygospores dividing 

 both gametangia, subglobose, 20-25 ft ^^ diameter, surrounded by a thin 

 pectic layer. Zygospores seen were smooth and colorless. They may not 

 have been mature, but the dimensions of the filaments and the zygo- 

 spores distinguish it clearly from all described species. (PI. XVII, 

 Fig. 18.) 



Haiti, Trou Caiman (R. M. Bond Coll.). 



After conjugation the filaments form a tangled meshwork, since they 

 bend in all directions during conjugation. 



64. MouGEOTiA CHEROKEANA Taft 1934. Trutis. Atuer. Micros. Soc. 



53, p. 222, Fig. 39. 



Vegetative cells 7-9 m x 90-120 /a; chromatophores with 2-6 pyre- 

 noids in a single row; conjugation scalariform; zygospores filUng the 

 tube and dividing both gametangia, globose, rarely subglobose, 21-25 /a 

 in diameter, surrounded by an outer pectic layer 4-6/i in thickness; 

 spore wall yellow to brownish-yellow, smooth. (PI. XVII, Fig. 23.) 



United States: Oklahoma, Wichita Mountains, April 29, 1932. 



65. MouGEOTiA AMERICANA Transeau 1918. Tech. Pub., No. 9. 



New York State College of Forestry, p. 237. 



Vegetative cells 4-5 /«• x 40-120 /x; chromatophores with 4-10 pyre- 

 noids in a single row; conjugating cells slightly or strongly geniculate; 

 zygospores dividing both gametangia, irregularly quadrate with con- 

 cave or convex sides; angles produced and truncate, the space between 

 the zygospore and the sporangium walls being filled with pectic ma- 

 terial; spores 1 3-24 /i X 18-32/x; wall colorless, smooth, transparent; 

 aplanospores obliquely elliptical, ends truncate at the middle of very 

 long genuflexed vegetative cells, 10-14 /a ^ 20-26 /x. (PI. XVIII, Figs. 1-3.) 



United States: Michigan; New York; Florida. 



66. MouGEOTiA coRNicuLATA Hansgirg 1886. Oesterr. Bot. 



Zeitschr., No. 10. 



Vegetative cells 5-7 ft x 30-1 80 ft; conjugation scalariform; sporan- 

 gia dividing both gametangia; zygospores quadrately ovoid, 22-26 ft x 



