PRELIMINARY LIST OF ALG^. 273 



C. Thwaitesii, Ralls.; High Park. 

 Cosmarium, Coi'da. 



C. ovale, Ralfs. ; Humber. 



C. Cucumis, Corda.; Humber. 



C. granatuni, Breb,; Humber. 



C. tumidum, Lund ; Humber, High Park. 



C. nitidulum, De Not. ; Humber, High Park, and Don Valley. 



C. Naegelianum, Breb. ; High Park. 



C. pseudopyramidatum, Lund ; Humber. 



C. anisochondrum, Nord.; Humber. 



0. Botrytis, Menegh ; Humber, Don Valley, and Ashbridge's Bay, 



C. Brebissonii, Menegh ; Humber. 



C. conspersum, Ralfs ; Ashbridge's Bay. 



0. intermedium, Delp ; Humber and High Park. 



0. reniforme (Ralfs), Arch. ; Humber. 



C. brierme, Nord.; High Park. 



C. protractum (Naeg.), Archer ; Humber, 



C. subcreuatum, Hantzsch ; High Park. 



C. Broomei, Thwaites ; Humber, Ashbridge's Bay. 



C. biretum, Breb. ; Humber, High Park. 



C. Beckei, Wolle ; Humber 

 Xanthidium, Ehrb. 



X. antelopaeum (Breb.), Kg. 



var. polymazum, Nord ; Ashbridge's Bay. 



Arthrodesmus, Ehrb. 



A. Incus (Ehrb.), Hass. ; Ashbridge's Bay. 



Euastrum Ehrb. 



E. inerme, Lund ; High Park. 

 E. rostratum, Ralfs ; Humber. 



Micrasterias, Ag. 



M. furcata (Ag.), Ralfs ; Ashbridge's Bay. 



Staurastrum, Meyen. 



St. dejectum, Breb.; Humber. 



St. Margaritaceum Ehrb. ; Humber. 



St. crenulatum, Naeg. (Delp.) ; Humber, Ashbridge's Bay. 



St. rugulosum, Breb. ; Humber. 



St. alternans, Breb. ; Humber, Ashbridge's Bay. 



St. cyrtocerum, Breb.; Humber. 



St. gracile, Ralfs ; Humber. 



St. nanum, Wolle ; High Park. 



St. pseudosebaldi, Wolle ; Humber. 



St. hirsutum (Ehrb.), Breb. 



Sb. furcigerum, Breb.; Ashbridge's Bay. 



