BULLETIN 



OF THE 



ILLINOIS STATE LABORATORY 



OF 



NATURAL HISTORY 



Urbana, Illinois, U. S. A. 



Vol. VIT ^^ December, 1905. Article \' 



NOTES ON SPECIES OF NORTH AMERICAN OLIGOCH.ETA. V. THE 

 SYSTEMATIC RELATIONSHIPS OF LUMBRICULUS ( THINODRILUS ) IN- 

 CONSTANS (SMITH ). 



BY 



FRANK SMITH, A. .W., 

 Assistant Professor of Z;iology, University of Illinois. 



Uf.ce.mber 26, 1905. 



