Smith—Algae Found in Wisconsin Lakes. 
547 
Pediastrum duplex MEYEN, in Nova Acta Phys-Med. 
Ac. Gaes. Leop.-Carol. 14. 2, (1828) p. 772. 
Plankton; Catherine, Helen (Eagle River), Kegonsa, La 
Belle, Lost, Mendota, Monona, Okauchee, Pardee, Soft, 
Taylor and Waubesa Lakes. 
var. clathratum (A. BRAUN) LAGERHEIM, in 
Ofvers. Kgl. Vet.-Ak. Forh. 39 , No. 2 (1882) p. 56. Pedias¬ 
trum pertusum var. clathratum A. Braun, Alg. Unicell. (1855) 
p. 93. 
Plankton; Catfish, Cranberry and Mud (Vilas Co.) Lakes, 
var. reticulatum LAGERHEIM, in Ofvers. Kgl. Vet.- 
Ak. Forh. 39 , No. 2 (1882) p. 56, t. z, fig. 1. 
Plankton; Found, Kawaguesaga, Mendota, Pardee, Sishe- 
bogema, Turtle (South), Waubesa and Winnebago Lakes. 
var. rotundatum LUCKS, in Jahrb. d. Westpr. Lehrer- 
vereins f. Naturkunde. 2-3 (1907) p. 31. 
Plankton; Oconomowoc Lake. 
Pediastrum Kawraiskyi SCHMIDLE, in Arb. d. Botan. 
Gartens zu Tiflis. 2 (1897) p. 269. Nitardy, in Beih. z. Bot. 
Cent. 32 (1914) p. 164, t. 5, fig. 5. 
Plankton; Lake Winnebago. 
Pediastrum simplex MEYEN, in Nova Acta Phys.- 
Med. Ac. Caes.-Leop. 14, 2 (1829) p. 772, t. 43, figs. 1-5. 
Plankton; Kegonsa, Monona and Winnebago Lakes, 
var. clathratum (SCHROTER) G. S. WEST, in Jour. 
Linn. Soc. London, 38 (1907) p. 134. Pediastrum clathratum 
(SCHROTER) LEMMERMANN, in Forschungsbr. a. d. 
Biol. Stat. zu Plon, 7 (1899) p. 115. 
Plankton; Green, Lost, Mud (Vilas Co.) Lakes. 
Genus EUASTROPSIS Lagerheim 1894. 
Euastropsis Richteri (SCHMIDLE) LAGERHEIM, in 
Tromso Museums Aarshefter, 17 (1895) p. 20, t. 1, figs. 8-27. 
Euastrum Richteri Schmidle, in Flora 78 (1894) p. 60, t. 7, 
fig. 25. 
Along shore; Lake Kegonsa. 
