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EDGAR NELSON TRANSEAU 
Spirogyra velata occidentalis nov. var. 
Caespites laete virides efformans; cellulis vegetativis 36-53 u latis, 
diametro 3-7-plo longioribus; chromatophoris 1-3, anfractibus 2-6; 
cellulis fructiferis cylindraceis vel inflatis, ad 66 /x latis; zygosporis 
ovoideis, 36-56 ju latis, mesosporio scrobiculato, maturitate fuscescenti- 
bus. 
Forming bright green masses; vegetative cells 36-53 jj. in diameter, 
125-300^11 in length; chromatophores i, 2, or 3, making 2-6 turns in 
the cell; fertile cells cylindrical or enlarged up to 66 in diam.; 
zygospores ovoid, 36-56 X 57-105 /jl, median spore wall scrobiculate ; 
spore color at maturity yellowish brown. 
This species has been found in the remnant of an old prairie pond 
on the Brookhart farm, southwest of Oilfield, and the small stream 
at Lerna, Illinois. It is closely related to S. velata Nordst., from 
which it differs in the number of chromatophores, larger dimensions 
of the vegetative cells, and the color of the mature spores. Type in 
herb. E. N. T. Collection No. 1826. Plate XXVI, figures 8-9. 
Spirogyra punctiformis nov. sp. 
Filamentis plerumque sparsis; cellulis vegetativis 27-30 /.t latis, 
4-14-plo longioribus, dissepimentis planis; chromatophoris gracilis 
1-2, anfractibus 3-6; cellulis fructiferis inflatis (44-50 latis); cellulis 
femineis 100-250 ^ longis, masculis 90-140 fx, singulis vel binis cellulis 
vegetativis alternis; tubo conjugationis plerumque ex cellula mascula 
emisso; zygosporis 40-48 /x X 60-1 10 ^u, ovatis vel cylindraceo-ovoi- 
deis, mesosporio punctulis obsito, maturitate flavescentibus. 
Filaments usually scattered; vegetative cells 27-30 />i X 120-390 )U, 
end walls plane; chromatophores one or two, narrow, making from 
3-6 turns in the cell; fertile cells inflated (44-50 ju in diam.); female 
cells 100-250 M long, male cells 90-140 long, occurring singly or in 
pairs, alternating with vegetative cells; conjugating tube usually 
produced by the male cell; zygospores ovate to cylindrical-ovoid, 
40-48 fjL X 60-110 /JL, median spore wall punctate, yellow when mature. 
In some respects this species resembles S. punctata Cleve, but 
differs in the number of chromatophores, in the size and form of the 
zygospores, and the frequent occurrence of the conjugating cells in 
pairs. Of considerable interest is the fact that the male cell is always 
shorter than the female. It fruits from late May to July in the New, 
and East Tile Factory ponds, Charleston, Illinois. Type in herb. 
E. N. T. Collections No. 627, 1986. Plate XXVI, figure 7. 
Spirogyra ellipsospora nov. sp. 
Filamentis saturate viridibus, lubricis; cellulis vegetativis 125- 
