328 Wisconsin Academy of Sciences, Arts, and Letters. 
Order Hormogoneales 
TRICHODESMIUM Ehrenberg 1830. 
Trichodesmium lactjstre Klebahn. 
Harbon (rrr), Loon (rrr). 
ANABAENA Bory 1822 
Anabaena limnetica G. M. Smith 
Pine (rrr). 
Anabaena Bornetiana Collins 
Vegetative cells 1R-13 y broad; heterocysts 10-13.75 fx broad: 
spores 12.5-16.5 y, broad, 46-111 fx long. 
Black (1) (r), Butterfly (r), Gull (1) (rrr), Gull (2) (rrr), Long (1) 
(rr), Loon (rr), Nelson (rr), Rowley (rr). 
The spores of this species are always adjacent to and in the 
great majority of cases on both sides of the heterocysts. The 
dimensions given above are slightly different from those of Collins. 
Anabaena spiroides Klebahn 
Cells 7.5-8.5 fx broad; heterocysts 7.5-8.75 [x broad; spores 10 
[x broad, 27-37.5 jx long. 
Clear (2) (rrr), Lake of Bays (rr). 
Anabaena Lemmermanni P. Richter 
Black (2) (r), Burned Rock (rrr), Harbon (sss), Joseph (rrr), Lake of 
Bays (r), Long (2) (rrr), Portage (rr). 
Anabaena flos-aquae (Lyng.) Ralfs 
Basil (rr), Big Dudley (rr), Black (1) (rr), Butterfly (r), Clear (1) 
(aa), Henshaw (rr),Long (1) (rr), Marion (rr),Pine (rr),Rosseau (rrr), 
Round (2) (rr), Rowley (rr), St. Mary (rr), Strange (rrr), Thompson 
(rr). 
APHANIZOMENON Morren 1838 
Aphanizomenon flos-aqae (L.) Ralfs 
Gull (1) (rrr), Lake of Bays (rr), Marion (rrr), Mill (rr), Rosseau 
(rrr), St. Mary (rrr), Thompson (rrr). 
