362 Wisconsin Academy of Sciences, Arts, and Letters. 
Desmidium aptogonum Breb. 
Hamer (rrr), Little Dudley (rrr). 
Desmidium Swartzii C. A. Agardh 
Clear (2) (rrr), White (rrr). 
Desmidium Baileyi (Ralfs) Nords. 
Black (2) (rrr), Marion (rrr), Mill (rrr), Otter (rrr). 
GYMNOZYGA Ehrenberg 1841 
Gymnozyga moniliformis Ehr. 
Big Dudley (rrr), Black (1) (rr), Brush (r), Leech (rrr), Mill (rrr), 
Otter (rr). Pine (rrr), Round (2) (ss), White (rrr). 
var. gracilescens Nords. Pl. XIII, fig. 17. 
Hamer (rr), Nelson (rrr). 
