PRELIMINARY LIST OF ALG^. 271 



Cladophora. 



C. fracta, Kg. ; Don Valley. 



C. glomerata, Kg. ; Humber. 

 ^ TTlothrix, Kg. 



U. zonata (W. and M.), Aresch.; common everywhere. 

 Conferva, Lk. 



C. vulgaris, Rab. ; Humber. 



Siphoned. 



Vaucheriace.5; — 

 Vaucheria, D.C. 



V. sericea, Lyngb. ; Don Valley. 



V. DiUwynii, Aq. ; High Park. 



V. sessilis (Vauch.), D.C; High Park and Don Valley. 



V. geminata (Vauch,), D.C; Don Valley. 



Protococcoide^. 

 volvocace^ — 

 Volvox, Ehrb. 



V. globator, Linn. ; Don Valley. 

 Eudorina, Ehrb. 



E. stagnale, WoUe ; Ashbridge's Bay. 

 Pandorina, Ehrb. 



P. morum, Bory. ; Ashbridge's Bay. 

 Gonium, Mueller. 



G. pectorale, Mueller ; High Park. This plant I have only found 

 once ; it seems to correspond to the European species. 

 Chlamydococcus, A. Br. 



C pluvialis, A. Br. ; rain-water pools ; common. 

 Protococcace.^ — 



Pediastrum, Meyen. 



P. Boryanum, Menegh ; Ashbridge's Bay. 

 P. Ehrenbergii, A. Br. ; High Park. 

 P. tetras, Ehrb. ; High Park. 

 Scenedesmus, Meyen. 



S. caudatus, Corda. ; High Park, Humber, Ashbridge's Bay. 

 S. acutus, Meyen ; same localities as preceding. 

 Characium, A. Br. 



C Naegelii, A. Br.; Don Valley. 

 Protococcus, Ag. 



P. viridis, A. ; common everywhere. 

 Polyedrium, Naeg. 



P. gigas, Wittr. ; Ashbridge's Bay. Possibly this is not an inde- 

 pendent species, but simply a stage in the development of 

 Hydrodictyon. 



