MOUGEOTIA 107 



with hornlike processes of varying length with rounded ends; spore 

 wall thick, yellow to yellow-brown, punctate. (PI. XVIII, Figs. 15-16.) 

 Africa, Angola. 



71. MouGEOTiA GRANULOSA Transeau 1938. Amer. Jour. Bot. 25, 



p. 525. 



Vegetative cells 14.4-18JU. x i40-i8o(-32o)iu. with 4 to 8 pyrenoids 

 in a row; conjugation scalariform; sporangium wall thick, transparent, 

 dividing both gametangia, varying from broadly ovoid to quadran- 

 gular-ovoid; spores 36-47 A*' X 42-52 ^a; walls yellow to brown, rarely 

 smooth, mostly granulose when mature, either apparently single or 

 distinctly double — both layers granulose when separated. (PL XVIII, 

 Figs. 18-20.) 



South Africa, Cape Town, Cape Flats (E. Stephens Coll.). 



72. MouGEOTiA CAPUCINA (Bory) Agardh 1824. Systema Algarum, 



p. 84. 



Vegetative cells 14-21 ju x 70-280 (-340) /t, usually violet colored; i 

 or 2 chromatophores either rod-shaped occupying one-third to one- 

 fourth of the cell with 4-8 pyrenoids, or ribbonlike occupying three- 

 fourths of the length of the cell with 12-16 ju, pyrenoids in a single row; 

 conjugation scalariform; the first sporangium walls are formed at a 

 distance (5-52 ;"•) from the zygospore, the intervening space filled with 

 pectic compounds; sporangium divides both gametangia; zygospores 

 irregularly quadrangular with concave sides, 50-70/4 x 60-100 /x; spore 

 wall violet to brown, thick especially at the angles, smooth; aplan- 

 ospores not uncommon, 20-36 /a x 45-70 (-80) /a, with more or less pro- 

 duced ends. (PI. XVIII, Figs. 26-31.) 



United States: Wisconsin; Michigan; New York; North Carolina; 

 Alabama; Florida. 



Widely distributed in Europe; Central Africa; northern South America; 

 Hawaii; New Zealand. 



In some collections there are double spores that are the result of division 

 of gametes just prior to conjugation. If conjugation fails in one or both 

 pairs of gametes there may be one or more parthenospores instead of 2 

 zygospores. At Tupper Lake, in the Adirondacks, September, 1936, a 

 specimen was found with a mature zygospore formed by scalariform conju- 

 gation between 2 adjacent cells of a filament. (PI. XVIII, Fig. 31.) 



73. MouGEOTiA DELiCATA Beck 1926. Archiv f. Protist. 55, p. 179, 



Fig. 17. 



Vegetative cells about 3.5 ju. in diameter; conjugation scalariform; 

 sporangia dividing both gametangia; zygospores cruciate-quadrate, 



