PAPERS BY MEMBERS 79 



Mougeotia viridis i^Kuetzing) W'ittrock. 



Collected in fruit in Campus pond, May, 1912. 



Volvocales 

 Chlamydomonadaceae 

 Haematococcus pluvialis Flotow. 



Apparently rare. Have noted typical specimens hct 

 once. These were collected from a small pool near 

 Hodgen's pond. 



Volvocaceae 



Gonium sociale (Duiard) \\'arming. 



Found in Urban Park pond. April. 1912. 

 Gonium pectorale Mueller. 



Xot infrequent in ponds and pools. 

 Pandorina Morum (Mueller) Bory. 



\'ery common in the more permanent ponds of eastern 

 Illinois. \'ery conspicuous in low water stages-- 

 probably through concentration. 

 Pleodorina illinoisensis Kofoid. 



Found in Little Muddv creek, north of Sailor Spring, 

 August. 1911. 

 Eudorina elegans Ehrenberg. 



Appears rather regularly in ponds during mid-summer. 

 Volvox globator Linnaeus. 



This species has been collected in the Ice Plant pond 

 at Casey and in a roadside ditch near Decker. Indiana. 

 Volvox aureus Ehrenberg. 



Collected but once in the west Tile Factory pond. 

 Charleston. July. 1911. 

 Ineffigiata neglecta W. & G. S. West. 



A'ery abundant in the plankton of the ponds of eastern 

 Illinois. 

 Tetraspora lubrica (Roth) Agardh. 



\'ery abundant in streams and ponds during the autimin. 

 winter and spring. The fronds not infrequently attain 

 a length of four feet. Fide Collins. 

 Tetraspora gelatinosa (Vauch.) Desvaux. 



Collected onlv once in a pond near the reservoir at Casev. 

 Sept.. 1911.' 

 Apiocystis Brauniana Xaegeli. 



Collected at [Marshall pond north of Charleston in April. 

 1912. 



Protococcales 

 Protococcaceae 



Chlorochytrium Knyanum Cohn & Szymanski. 



\*erv abundant in the leaves and stems of Nasturtium 



