PRELIMINARY LIST OF ALG^. 273 



C. Thwaitesii, Raits.; High Park. 

 Cosmarium, Corda. 



C. ovale, Ralfs. ; Humber. 



C. Cucumis, Corda.; Humber. 



C. granatum, Breb. ; Humber. 



C. tumidiim, Lund ; Humber, High Park. 



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



C. Naegelianum, Breb,; High Park. 



C. pseudopyramidatum, Lund ; Humber. 



C. auisochondrum, Nord. ; Humber. 



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



C. Brebissonii, Menegh ; Humber. 



C. conspersum, Ralfs ; Ashbridge's Bay. 



C. intei-medium, Delp ; Humber and High Park. 



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



C. brierme, Nord.; High Park. 



C. proti'actum (Naeg.), Archer ; Humber, 



C. subcrenatum, Hantzsch ; High Park. 



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



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

 C. Beckei, Wolle ; Hu uter 

 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. cren\ilatum, 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. 



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



