Smith—Algae Found in Wisconsin Lakes. 
535 
Genus MICROCYSTIS Kiitzing 1833. 
Microcystis aeruginosa KUTZING, Tabulae Phycol. 
1 (1849) p. 6, t. 8. 
Plankton; Kegonsa, La Belle, Mendota, Otter, Old Tay¬ 
lor’s, Pardee and Turtle (North) Lakes. 
var. major (WITTROCK) nov. comb. Polycystis aeru¬ 
ginosa var. major Wittrock, in Hansgirg, Prodr. d. Algen- 
flora v. Bohmen, 2, (1892) p. 146. 
Plankton; Lake Mendota. 
Microcystis flos-aquae (WITTROCK) KIRCHNER, 
in Engler und Prantl, D. nat. Pflanzenfam. Teil. 1, Abt. la 
(1900) p. 56, fig. 49N. Polycystis Flos-aquae Wittrock, in 
Wittrock et Nordstedt, Algae aq. dulc. exsicc. No. 298. 
Plankton; Birch, Catfish, Found, Mud (Vilas Co.), Nasho- 
tah (Upper), Nemahbin (Lower), No Mans, Oconomowoc, 
Okauchee, Pardee, Plum, Rainbow, Rock (Vilas Co.), Rose, 
Saint Germain (Big), Sishebogema, Squirrel, Star, Tama¬ 
rack, Turtle, (North and South), Waubesa and Winnebago 
Lakes. 
Microcystis incerta LEMMERMANN, in Abh. Nat- 
urw. Ver. Bremen, 17 (1903) p. 342. Polycystis incerta Lem- 
mermann, in Ber. d. D. bot. Ges. 19 (1901) p. 93, t. 4, fig. 8. 
Plankton; Lake Winnebago. 
Microcystis pulverea (WOOD) MIGULA, Kryptoga- 
men-Flora Bd. 2, Algen, Th. 1 ; in Thome, Flora von Deutsch¬ 
land, Deutsch-Osterr. u. d. Schw. 6 (1907) p. 36. Pleurococcus 
pulverus Wood, in Smithsonian cont. to knowl. 19, no. 241 
(1874) p. 79. Anacystis pulvera (Wood) Wolle, Freshw. 
Algae of U. S. (1887) p. 329, t. 210. fig. 10. 
Plankton; Pardee and Sunday Lakes. 
Microcystis ichthyoblabe (KUNZE) KUTZING, Phy¬ 
col. gener. (1843) p. 170. Palmella ichthyoblabe Kunze, in 
Kiitzing, l.c. p. 170. Polycystis ichthyoblabe Kiitzing, 
Tabulae Phycol. 1 (1849) p. 7, t. 8. 
Plankton; Catfish, Clear, Kawaguesaga and Minocqua 
Lakes. 
