536 Wisconsin Academy of Sciences , Arts, and Letters . 
Genus GOMPHOSPHAERIA Kiitzing 1836. 
Gomphosphaeria aponina KUTZING, Decades, 16 
(1836) No. 151. Kiitzing, Tabulae Phycol. 1 (1849) p. 22, 
t. 31, fig. 3. 
Plankton; Kegonsa, Mendota, Monona, Nemahbin 
(Lower), Otter, Pewaukee, Plum, Turtle (North and South), 
and Waubesa Lakes. 
var. cordiformis WOLLE, in Bull. Torr. Bot. Club, 9 
(1882) p. 25, t. 13, fig. 11. 
Plankton; Round Lake. 
Genus COELOSPHAERIUM Nageli 1849. 
Ceelosphaerium Naegelianum UNGER, in Mitth. d. 
Naturw. Ver. f. Steiermark, Bd. 2, Heft. 1, t. 2. Kirchner, 
in Engler und Prantl, D. nat. Pflanzenfam. Teil. 1 , Abt. la 
(1900) p. 56, fig. 50A. (As C. Kuetzingianum ). 
Plankton; Birch, Catfish, Catherine, Cranberry, Devil’s, 
Found, Kawaguesaga, La Belle, Lost, Mendota, Minocqua, 
Monona, Mud (Vilas Co.). Nashotah (Upper and Lower), 
Nemahbin (Upper and Lower), No Mans, Oconomowoc, 
Okauchee, Otter, Pardee, Pewaukee, Plum, Rainbow, Rock 
(Vilas Co.), St. Germain (Big), Sishebogema, Squirrel, Tama¬ 
rack, Turtle (North and South), Waubesa and Winnebago 
Lakes. 
Coelosphaerium dubium GRUNOW, in Rabenhorst, 
Flora Eur. Algarum, 2 (1865) p. 55. Schmula, in Beiblatt zur 
“Hedwigia”, 37 (1898) p. (47), figs. 1-2. 
Plankton; Mud Lake (Vilas Co.) 
Coelosphaerium Kuetzingianum NAGELI, Galt. einz. 
Algen, (1849), p. 54, t. 1, fig. C. 
Plankton; Catfish, Cranberry, Kegonsa, Mendota, Ocono¬ 
mowoc, Pardee, Pewaukee, Rock (Vilas Co.), Sunday, 
Tamarack and Turtle (North and South) Lakes. 
Genus MERISMOPEDIA Meyen 1828. 
Merismopedia glauca (EHRENBERG) NAGELI 
Gatt. einz. Algen, (1849) p. 55, t. 1, fig. Dl. Gonium glau- 
cuum Ehrenberg, Die Infusionsthierchen, (1838) p. 56, t. 3, 
fig. 5. 
