BIOLOGICAL PAPERS 145 



list, as it does not inhabit Illinois. The references quoted should 

 be placed under obrussa. 



Page III. — Add: Bifidaria clappi, Sterki. Ottawa, La Salle 

 county (Calkins). 



Page 113. — Add: Succinea ovalis optima, Pilsbry. Fox River 

 (Calkins) ; Carpenterville, Kane county (Calkins) ; Rock River, 

 Oregon, Ogle county (Baker), Succinea ovalis totteniana, Lea, 

 is a synonym of Succinea ovalis, Say. 



The Succineas are badly in need of revision, and some of the 

 names given on pages 113 and 114 are to be retained provision- 

 ally, pending a revision of the whole genus. 



Page 114. — For Polygyra tridentata juxtigens, read Polygyra 

 trident at a juxtidens. 



Page 115. — For Polygyra profunda alba, Witter, read Polygyra 

 profunda alba, Walker. Polygyra sayii, Binney, should be 

 changed to Polygyra sayana, Pilsbry (name preoccupied). 



Page 116. — Polygyra exoleta, Binney, should be changed to 

 Polygyra zaleta, Binney (earlier name). 



Page 117. — Polygyra monodon fraterna, Say, should be 

 changed to Polygyra fraterna, Say. 



Page 119. — Add: Vitrea (Paravitrea) sigJiificans (Bland). 

 Auger ville Woods, L"^rbana, Champaign county (Zetek). 



EARTHWORMS FROM ILLINOIS. 

 Frank Smith. 



The literature on Illinois earthworms has been very scanty. 

 In 1888, Carman, of the State Laboratory of Natural History, 

 described Diplocardia communis as a new genus and species from 

 specimens of earthworms found at Urbana. He also listed three 

 species of Lumbricidae from the vicinity, all well-known Euro- 

 pean forms. 



In 1893, Ude, of Hanover, Germany, described a form col- 

 lected at Danville, Illinois, as a new genus and species, Geodrilus 

 singularis, but it is now considered merely as a variety of Gar- 

 man's Diplocardia communis. 



In 1895 I had the opportunity to describe another species of 

 Diplocardia from Havana, Illinois, and also a species of aquatic 

 earthworm from the same place, belonging to the genus Spar- 



