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 pyre- 

 noids 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) yu. in diameter; spore wall yellow-brown, 

 smooth. (PL XIV, Figs. 7-8.) 



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 pyre- 

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

 greatly enlarged conjugating tubes and extending nearly or quite across 

 the gametangia, globose to ovoid, 35-44 /x 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.) 



