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MOUGEOTIA 107<br />
with hornlike processes of varying length with rounded ends; spore<br />
wall thick, yellow to yellow-brown, punctate. (PI. XVIII, Figs. 15-16.)<br />
Africa, Angola.<br />
71. MouGEOTiA GRANULOSA Transeau 1938. Amer. Jour. Bot. 25,<br />
p. 525.<br />
Vegetative cells 14.4-18JU. x i40-i8o(-32o)iu. with 4 to 8 pyrenoids<br />
in a row; conjugation scalariform; sporangium wall thick, transparent,<br />
dividing both gametangia, varying from broadly ovoid to quadran-<br />
gular-ovoid; spores 36-47 A*' X 42-52 ^a; walls yellow to brown, rarely<br />
smooth, mostly granulose when mature, either apparently single or<br />
distinctly double—both layers granulose when separated. (PL XVIII,<br />
Figs. 18-20.)<br />
South Africa, Cape Town, Cape Flats (E. Stephens Coll.).<br />
72. MouGEOTiA CAPUCINA (Bory) Agardh 1824. Systema Algarum,<br />
p. 84.<br />
Vegetative cells 14-21 ju x 70-280 (-340) /t, usually violet colored; i<br />
or 2 chromatophores either rod-shaped occupying one-third to one-<br />
fourth of the cell with 4-8 pyrenoids, or ribbonlike occupying threefourths<br />
of the length of the cell with 12-16 ju, pyrenoids in a single row;<br />
conjugation scalariform; the first sporangium walls are formed at a<br />
distance (5-52 ;"•) from the zygospore, the intervening space filled with<br />
pectic compounds; sporangium divides both gametangia; zygospores<br />
irregularly quadrangular with concave sides, 50-70/4 x 60-100 /x; spore<br />
wall violet to brown, thick especially at the angles, smooth; aplan-<br />
ospores not uncommon, 20-36 /a x 45-70 (-80) /a, with more or less pro-<br />
duced ends. (PI. XVIII, Figs. 26-31.)<br />
United States: Wisconsin; Michigan; New York; North Carolina;<br />
Alabama; Florida.<br />
Widely distributed in Europe; Central Africa; northern South America;<br />
Hawaii; New Zealand.<br />
In some collections there are double spores that are the result of division<br />
of gametes just prior to conjugation. If conjugation fails in one or both<br />
pairs of gametes there may be one or more parthenospores instead of 2<br />
zygospores. At Tupper Lake, in the Adirondacks, September, 1936, a<br />
specimen was found with a mature zygospore formed by scalariform conju-<br />
gation between 2 adjacent cells of a filament. (PI. XVIII, Fig. 31.)<br />
73. MouGEOTiA DELiCATA Beck 1926. Archiv f. Protist. 55, p. 179,<br />
Fig. 17.<br />
Vegetative cells about 3.5 ju. in diameter; conjugation scalariform;<br />
sporangia dividing both gametangia; zygospores cruciate-quadrate,