Bulletin 



OF THE 



Illinois State Laboratory 



OF 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. EORBES, Ph.D., LE.D. 

 Director 



Vol. X. March, 1914 Article IIL 



STUDIES ON THE ENCHYTR^ID^ 

 OF NORTH AMERICA 



BY 



Paul Smith Welch. Ph.D. 



