442 Illinois State Laboratory of Natural History. 



Allolobophora caliginosa trapezoides Duges. 1 Urbana and 

 Havana ; abundant. 



Allolobophora sp." Urbana and Havana ; frequent. 



Geoscolicidd'. 



Sparganophilus eiseni Smith. Urbana and Havana; 

 abundant. 



Acanthodrilidce . 



Diplocardia communis Garman. Urbana; abundant. 

 Diplocardia riparia Smith. Havana; abundant. 

 Diplocardia singularis Ucle. Urbana and Havana ; fre- 

 quent. 



Diplocardia sp. 3 Havana; frequent. 



Lumbriculidce. 



Thinodrilus inconstans Smith. Havana; abundant. 

 Mesoporodrilus asymmetricus Smith. Havana; infrequent. 



Phreoryctidce. 



Phreoryctes emissarius Forbes. Urbana, infrequent; 

 Havana, abundant. 



Enchytrceidce. 

 Fridericia agilis Smith. Havana; abundant. 



Tubificida. 



Tubifex rivulorum Lamarck. Urbana and Havana ; 

 abundant. 



Limnodrilus claparedianus Eatzel. Urbana and Havana; 

 abundant. 



1 A- tunjida Garman, non Eisen. 



- A species closely allied to A. giesleri Ode, Knit its exact relationship has not yet 

 been determined. 



3 A species closely allied to D. verrucosa Ude. Exact relationship not yet 

 determined. 



