Jso. 478] 



OHIO NAIDIDM 



like processes. Three pairs of hearts in segments 8, 9, and 10. 

 Brain wider than long. I.ength <S mm. or more; numl)er of seg- 

 ments in an in(hvidnal 24 to 35. 



In slime of ditches, etc., among fresh-water plants. Massachu- 



This species was exrrciiic- 

 ly common at Cedar r.mil. 

 particularly among cultures 



tlictluinu.ofulm-hto-i'tluM- 



uith .tan.i)hi>T. of hr^<v<.a, 

 etc., it uses iu the huildiuu- 



Stylaria lacustris ( Lnnic 



