372 



Summary op Bottom Spbx:ibs Lists, Lower Peoria Lake, Simmer 1922 

 4. changes from mid-chan.nel outward ivto wide waters. 



NUMBe'R OF KINDS TAKEN 



Larvae. 



WORMS 



Though tubificid worms occurred at eleven out of the total of 

 eighteen stations in the lower lake in 1922, and included four species, 

 one of which was Tubifex tubifex, their numbers were generally so 

 small as to be of no especial consequence. The commoner kinds were 

 species of Limnodrilus, as in the upper and middle lakes. and7". tubi- 

 fex occurred only at a single station. The comparison with the middle 



