Plate XIII. 
Figs. 1a, 1b, 1d.—Euastrum ansatum, var. maxima, p. var., Borge, x 270. 
Figs. 24, 2b.—Euastrum asperum, Borge, n. sp., x 740. 
Fig. 3.—Kirchneriella lunata, Schmid., x 740. 
Fig. 4.—Micrasterias alata, Wall, x 390. 
Figs. 5, 5a.—Desmidium bengalicum, forma, Borge, x 740. 
Fig. 6.—Micrasterias oscitans, var. pinnatifida, forma, Borge, x 270. 
Figs. 7a, 7b, 7c.—Euastrum rostratum, var. premorsum, forma, Borge, * 740. 
Figs. 8a, 8b, 8d.—Euastrum rostratum, var. preemorsum, forma, Borge, * 740. 
Figs. 9, 94.—Staurastrum retusum, var, granulatum, Borge, 0. Vales X Loe 
Figs. 10a, 100, 10c.—-Euastrum divergens, var. australianum, 
Fig. 11.—CEdogonium sp., Borge, x 270. 
Figs. 12, 12a, 12b.—Euastrum verrucosum, var. Mobii, Borge, n. vate * 300. 
x 740, 
Borge, D- var. x7 
Figs. 13, 13¢,—Euastrum spinulosum, var. ornatum, Borge, 0. VaFes 
