94 ZYGNEMATACEAE 



Philippine Islands; Africa. 



This species has been previously classified as Debarya ajricana G. S. 

 West, and as M. sphaerocarpa var. varians Transcau. 



i8. MouGEOTiA ovALispORA KHcger 1941. Rabenhorst's Krypt- 

 ogamenfiora. 13 (2), p. 134. 



Vegetative cells 37-40/1 x 8o-i2o/>; chromatophores with 8 to 10 

 scattered pyrenoids; conjugation scalariform; zygospores in the con- 

 jugating tubes, ovoid to ellipsoid, 39-41 /^ x 51-59/^; spore wall thick, 

 smooth, yellow-brown. (PI. XIV, Fig. 14.) 



Germany, Brandenburg, Griinrade. 



19. MouGEOTiA HiRNii Transeau 1934. Trans. Amer. Micros. Soc. 



53, p. 218. 



Vegetative cells 25-28/1. x 60-1 40 /i.; chromatophores with 4-8 pyre- 

 noids in a row; conjugation scalariform; zygospores formed wholly in 

 the conjugating tube, ovoid, 40-48 /x x 43-50 /x; spore wall yellow-brown, 

 smooth. (PI. XIV, Fig. 13.) 



United States: Michigan (Ackley Coll.). 



Finland; China (McClure Coll.). 



Formerly classified as M. scalaris var. macrospora Him. 



20. MouGEOTiA GENUFLEXA (Dillwyn) C. A. Agardh 1824. Systema 



Algarum, p. 83. 



Vegetative cells 25-38 /a x 50-225/1, often geniculate and attached to 

 other similar cells, forming extensive nets, sometimes with rhizoidal 

 branches; conjugation lateral, less frequently scalariform; zygospores 

 quadrately ovoid to globose, 30-40/1 in diameter; spore wall smooth, 

 brown. (PI. XIV, Figs. 16-17.) 



United States: Minnesota and Wisconsin to Louisiana; eastward to 

 Massachusetts and Florida. 



Generally distributed in Europe; China, Kiangsi; Manchuria; Morocco. 



21. MouGEOTiA MACROSPORA (Wollc) dc Toni 1889. Sylloge Al- 



garum. 1, p. 716. 



Vegetative cells about 30/i x 180-300/1; conjugation scalariform; 

 zygospores formed in the conjugating tubes, globose, 55-70/1 in diam- 

 eter; spore wall smooth. (PI. XIV, Fig. 15.) 



United States: Pennsylvania; New Hampshire. 



22. MouGEOTiA SUBCRASSA G. S. Wcst 1909. ]our. Linti. Soc. of 



London Bot. 39, p. 50. 

 Vegetative cells 41.5-43/'- x 240-280/1; chromatophore with 15-24 

 pyrenoids arranged irregularly; gamctangia straight or slightly curved; 



