338 Wisconsin Academy of Sciences, Arts, and Letters. 
Kirchneriella contorta (Schmidle) Bohlin 
Black (1) (rrr), Butterfly (rr), Corner (rrr), Marion (rrr), Otter 
(rrr), Silver (2) (rrr), Thompson (rr), Vernon (rrr). 
Kirchneriella elongata G. M. Smith 
Harbon (rrr), Muldrew (rrr), Nine Mile (rrr). 
CRUCIGENIA Morren 1830 
Crucigenia rectangularis (Nag.) Gay 
Big Dudley (rrr), Lake of Bays (rrr), Long (1) (rrr), Muldrew (rrr). 
Nine Mile (rrr),iRound (2) (rrr), Rowley (rrr), Vernon (rr). 
Crucigenia truncata G. M. Smith 
Butterfly (rr), Vernon (r). 
Crucigenia apiculata (Lemm.) Schmidle 
Big Dudley (rr), Black (1) (rrr), Harbon (rrr). 
Crucigenia quadrata Morren 
Black (1) (rr), Butterfly (r), Harbon (rrr), Marion (rrr), Muldrew 
(rrr), Nine Mile (rrr), Rowley (rrr), St. Mary (rrr), Vernon (rr). 
Crucigenia Tetrapedia (Kirchner) W. & G. S. West 
Big Dudley (rrr), Black (1) (rrr), Burned Rock (rrr), Vernon (rr). 
SCENEDElSMUS Meyen 1829 
SCENEDESMUS OBLIQUUS (Turp.) Ktz. 
Black (1) (rrr), Long (1) (rrr), Mud (rrr). 
SCENEDESMUS DIMORPHUS (Turp.) Ktz. 
Vernon (rrr). 
Scenedesmus INCRASSATULUS var. mononae G. M. Smith PL VIII. 
figs 4-7. 
Trans. Wis. Acad. Sci., Arts, & Lett. 18 3 : 440. PI. 29, figs. 81-83. 1916. 
Cells 3.75-6 p broad, 12.5-16 p long (without apiculations). 
Colonies 12.5-26 p broad, 17.5-26 p long. 
Butterfly (r). 
