THE ALGAE 



Family Volvocaceae. 



Gonium pectorale, Mueller. 



Pandorina morum, Borg. 



Eudorina elegans, Ehr. 



Volvox globator, L. 



Volvox aureus, Ehr.* In pools at Lome Park. 



Order Protococcales. 



Family Protococcaceae. 

 Characium naegelii, A. Br. 



Family Scenedesmaceae. 

 Zoochlorella parasitica, Brandt* The cause of the 



green color of fresh-water sponges. 



Howard Lake and elsewhere. 

 Rhaphidium falcatum, Cooke. Often so abundant 



in aquarium jars as to color the water 



dark green. 



Tetraedron gigas, Wittr. 

 Scenedesmus obliquus, Kutz. 

 " bijuga, Wittr.* 



quadricauda, Breb. 



Family Hydrodictyaceae. 



Hydrodictyon reticulatum, Lager.* In a stream 

 running from Don Brick Works. 

 Abundant in creek at Acton West, 

 northwest of railroad station. 

 Pediastrum boryanum, Menegh. 

 " tetras, Ehrb. 



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