MOUGEOTIA 103 



56. MouGEOTiA ATUBULOSA Kricgcr 1941. Rabenhorst's Krypt- 



ogamenfJora. 13 (2), p. 168. 



Vegetative cells 19-21 /a x 100-140/^; chromatophores with several 

 pyrenoids in a row; conjugation scalariform; zygospores compressed- 

 ovoid, 25-27^1/, X 20-21 ju., with the longer axis parallel with the filaments, 

 wholly within the conjugating tubes; at maturity the tube wall becomes 

 a pectic wall 8-10 ^t in thickness; spore wall blue, coarsely punctate; 

 pits about .5 /A in diameter, 1-1.5A1 apart. (PI. XVII, Figs. 13-14.) 



Java, Dieng Plateau (B. Rensch Coll.). 



57. MouGEOTiA OPERCULATA Transeau 1934. Trans. Amer. Micros. 



Soc. 53, p. 220, Fig. 52. 



Vegetative cells 18-21 /a x 60-285/^; chromatophores with 4-8 pyre- 

 noids, usually 4; conjugation scalariform; zygospores in the conjugating 

 tubes, compressed-spheroid, 27-30/^ x 21-27 jU., with a prominent equa- 

 torial ridge and suture on the wall; spore wall pale yellow, shallow- 

 scrobiculate. (PI. XVII, Figs. 11-12.) 



United States: Oklahoma; Mississippi; Florida. 



58. MouGEOTiA PAWHUSKAE Taft 1934. TruHS. Amer. Micros. Soc. 



53, p. 220. 



Vegetative cells i8-22iu x 90-170/1,; chloroplasts with 6-8 pyrenoids 

 in a row; conjugation scalariform; zygospores in the conjugating tubes, 

 compressed-globose, 34-40 /a x 25-32^1, with the longer axis at right 

 angles to the tubes, surrounded by a pectic layer 4-16/1 in thickness; 

 spore wall yellow to yellow-brown, scrobiculate, with a distinct equa- 

 torial suture. (PI. XVII, Figs. 24-25.) 



United States: Oklahoma, Pawhuska, April 25, 1932. 



59. MouGEOTiA SEMINOLEANA Tiffany 1934. Trans. Amer. Micros. 



Soc. 53, p. 220, Fig. 40. 



Vegetative cells 20-25 /t x 70-200 /t; chromatophores with 4-12 pyre- 

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

 tubes, compressed-globose, 32-47 /x x 25-36/1; outer sporangium wall a 

 pectic layer 2-4 /a in thickness, absent from most of the mature spores; 

 spore wall brown to dark chestnut brown, coarsely punctate, suture 

 sometimes prominent, sometimes scarcely visible; aplanospores smaller, 

 20-22/1 X 25-29/1, usually outside the mother cell, otherwise similar to 

 the zygospores. (PI. XVII, Fig. 22.) 



United States: Florida, Fort Myers; Texas, Fredericksburg (Taft Coll.). 



The last of the series with compressed-globose spores, which begins 

 with M. depressa Number 49. 



