0)1 Ph'Oiior'nia iUlnolsensis. 



21):5 



EXPLANATION OF PLATES. 



AHP.REVIATIONS. 



Plate XXXYL 



Pleodorina ilh'noisensis, lateral view of colony. X nOO. 



Lateral view of vegetative cell. X 1500. 



Lateral view of gonidial cell. X 1500. 



Lateral view of matured colony, showing posterior lobes. 



X 185. 

 Diseased cell, early stage. X 1250. 

 Diseased cell, later stage. X 1250. 



Plate XXXYIL 



Pleodorina i/Unofsensis, toj) view of 2-cell stai>e. 



Top view of 4-cell stage. 



Ivateral view of 4-cell stage. 



Top view of 8-cell stage. 



Lateral view of 8-cell stage. 



Top view of IG-cell stage. 



Lateral view of 16-cell stage. 



Top view of ;52-cell stage. 



<"ignres drawn by C. A. Kofoid and inked by Miss L. M. Hart. 

 •'igs. 7-14 niHsnified IfMK) diameters. 



