556 Wisconsin Academy of Sciences, Arts, and Letters . 
Sub-family SELENASTREAE 
Genus ANKISTRODESMUS Corda 1836. 
Ankistrodesmus falcatus (CORDA) RALFS, Brit. 
Desmidieae (1848) p. 180, t. 34, figs. 3a-3d. Micrasterias 
falcata Corda, in Almanach de Carlsbad, 5 (1835) p. 198, 
t. 2, fig. 29. 
Plankton; Kawaguesaga and Rock Lakes. Along shore; 
Clear, Devil’s, Helen (Winchester), Kegonsa, Marion, Men- 
dota, Minocqua, Old Taylor’s, Razorback, Rozen and Wau- 
besa Lakes. 
var. acicularis (A. BRAUN) G. S. WEST, Brit. Freshw. 
Algae, (1904) p. 223, figs. 94B-94C. Raphidium aciculare 
A. Braun, in Rabenhorst, Die Algen Sachsens, Dec. 44 
(1855) No. 442. 
Plankton; Lakes Mendota and Waubesa. Along shore; 
Devil’s Lake. 
var. spiralis (TURNER) G. S. WEST, Brit. Freshw. 
Algae, (1904) p. 224. Raphidium spiralis Turner (1893). 
Along shore; Old Taylor’s and Soft Lakes, 
var. mirabilis (W. & G. S. WEST) G. S. WEST, Brit. 
Freshw. Algae, (1904) p. 224, fig. 94E. Raphidium polymor- 
phum var. mirabile W. & G. S. West, in Jour, of Roy. Micr. 
Soc. (1897) p. 501, t. 7, figs. 9-13. 
Plankton; Devil’s and Squirrel Lakes. 
Ankistrodesmus Pfitzeri (SCHRODER) G. S. WEST, 
Brit. Freshw. Algae, (1904) p. 224, figs. 94G-94H. Raphid¬ 
ium Pfitzeri Schroder, in Verh. d. Nat.-Med. Ver. zu Heidel¬ 
berg, N. F. 7 (1902) p. 152, t. 6, fig. 6. 
Plankton; Clear, Cranberry, Devil’s, Found, Harris,Mus- 
kallonge, No Mans, Oconomowoc, Okauchee, Pardee, and 
Sishebogema Lakes. 
Genus ACTINASTRUM Lagerheim 1882. 
Actinastrum Hantzschi LAGERHEIM, in Ofvers. 
Kgl. Vet.-Ak. Forh. 39, No. 2 (1882) p. 70, t. 3, figs. 25-26. 
Plankton; Kegonsa, Mendota and Waubesa Lakes. 
