548 Wisconsin Academy of Sciences , Arts , and Letters . 
Genus HYDRODICTYON Roth 1800. 
Hydrodictyon reticulatum (L) LAGERHEIM, in 
Ofvers. Kgl. Vet.-Ak. Forh. 40 , No. 2 (1883) p. 71. Conferva 
reticulata Linnaeus, Spec. Plant, p. 1635. 
Along shore; Lake Kegonsa. 
Sub-order AUTOSPORINEAE 
Family CHLORELLACEAE 
Sub-family CHLORELLEAE 
Genus CHLORELLA Beyerinck 1890. 
Chlorella vulgaris BEYERINCK, in Bot. Ztg. 48 (1890) 
p. 758, t. 7, fig. 2. 
Plankton; Lake Mendota. 
Sub-family DIGTYOSPHAERIEAE 
Genus TETRAGOCGUS W. West 1892. 
Tetracoccus botryoides W. WEST, in Jour. Roy. Micr. 
Soc. (1892) p. 735, t. 10, figs. 43-48. 
Plankton; Mendota and Sishebogema Lakes. Along shore; 
Clear and Devil’s Lakes. 
Genus DICTYOSPHAERIUM Nageli 1849. 
Dictyosphaerium pwlchellum WOOD, in Smithsonian 
Cont. to Knowledge, 19, No. 241 (1872) p. 84, t. 10, fig. 4. 
Plankton; Birch, Catfish, Catherine, Clear (Vilas Co.), 
Cranberry, Kegonsa, Mendota, Monona, Muskallonge, 
Oconomowoc, Okauchee, Old Taylor’s, Rock, Rose, Rozen, 
Tamarack, Turtle (North and South), Waubesa and Win¬ 
nebago Lakes. 
Dictyosphaerium Ehrenbergianum NAGELI, Galt, 
einz. Algen. (1849) p. 73, t. 2, fig. E. 
Plankton; Clear, Kegonsa and Mendota Lakes. 
