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MOUGEOTIA 93
tending somewhat into both gametangia, ovoid to subglobose, 36-40 m x
40-55 Ai; spore wall brown, smooth; aplanospores ovoid to obliquely
ovoid, 24-30 ju. X 35-50 /i. (PL XIV, Figs. 4-6.)
United States: Generally distributed throughout.
China, several provinces (Li and Jao); India.
In some collections aplanosporic filaments are more abundant than
conjugating filaments.
15. MouGEOTiA scALARis Hassall 1842. Ann. and Mag. Nat. Hist.
10, p. 45.
Vegetative cells 20-34 /a x 40-1 80 /x; chromatophores with 4-10 pyrenoids
in a single row; fertile cells straight or slightly curved; conjuga-
tion scalariform; zygospores formed wholly in the conjugating tube,
ovoid to globose, 30-38 (-40)
smooth. (PL XIV, Figs. 7-8.)
yu. in diameter; spore wall yellow-brown,
United States: Generally distributed in the eastern half.
Southern Ontario; widely reported from Europe; China; lapan; India;
New Caledonia; Queensland.
16. MouGEOTiA joGENSis Iyengar 1932. Rev. Algolog. 6, p. 268,
Fig. 2.
Vegetative cells 22-26 /a x 100-200 /x, with a pectic sheath 6-7 /a in
thickness; chromatophores platelike with 4-8 pyrenoids in a single row;
conjugation scalariform and lateral; zygospores formed in the greatly
enlarged conjugating tubes and finally cut of5 from the adjoining gam-
etangia by lamellate thickenings of the sporangium wall; zygospores
globose to ellipsoid, 47-52 /a in diameter; spore wall brown, smooth.
(PL XIV, Figs. 9-10.)
India, Mysore.
The tube primordia in lateral conjugation sometimes arise at some
distance from the partition walls.
17. MouGEOTiA AFRicANA (G. S. Wcst) Transcau 1944. Ohio Jour.
Sci. 44, p. 244.
Vegetative cells 24-28 /i x 44-200 /x; chromatophore with 4-16 pyrenoids
in a single row; conjugation scalariform; zygospores in the
greatly enlarged conjugating tubes and extending nearly or quite across
the gametangia, globose to ovoid, /x 35-44 x 44-60^; spore wall brown,
smooth ; walls of gametangia usually thickened by an apparent change
to pectic compound, and superficially suggesting a Debarya, readily
distinguished from the latter, however, by the absence of completely
filled gametangia; aplanospores and parthenospores ovoid, 20-25^ x
22-30 /A, formed near the middle of the sporogenous cells. (PL XIV,
Figs. 11-12.)