VOL. VI. JULY-SEPTEMBER, 1920 NOS. 10, 11. 



AMERICAN jKlIDLAIi D 



NATURALIST 



Devoted to Natural History, Primarily 

 that of the Prairie States 



Published by the University of Notre Dame, 



M * T^ T ^- SEP 27 ^ 



Notre Dame, Indiana ^ ' 



J. A. NIEUWLAND, C. S. C, Ph. D., Sc. D., Editor 



CONTENTS 



Variation in Nacreous Color of Certain Species of Naiades 

 Inhabiting the Upper Ohio Drainage and their Corres- 

 ponding Ones in Lake Erie. (Plites I 11,111.) 



R. N. Grier, Ph. D. 211 



Dr. Joel Lunelt. (Frontispiece) 243 



"Waterfowl in Nebraska." Brother Alphonsus, C. S. C. 245 



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