107 



Section I'liroxoma Dal I. 



Planorhis tt'lvolvis 8ay ( = falla.r Hald., iiiei/oiitoiitfi De Kay, hntun 

 of authors, not of Say).* 

 Cook Co. (Baker, Calkins, Lyon, Nason ) ; Southern Illinois 

 (Binney, Ulft'ers) : Northern Illinois (Calkins) ; Joliet, Will Co.; 

 Desplaines Kiver (Ferriss) ; (i)uincy, Adams Co. (Carman); 

 East Branch Du Page Kiver ( Cault) ; Romeo and .loliet, Will Co. 

 (Handwerk); Kappa, Woodford Co.; Qiiincy, Adams Co. 

 (Hart); Kishwaukee and Little Wabash rivers; Winnebago, 

 Washington, and Hardin counties; Seifert, Perry Co. (Hink- 

 ley ) ; La Salle Co. ( Huett) ; Crystal Lake, McHenry Co. (Lyon) ; 

 Eastern Illinois; Mercer Co. (Marsh); Athens, Menard Co.; 

 Fox River, Algonquin and Silver Lake, McHenry Co. ; Elgin, 

 Kane Co. (Nason ) ; Fulton Co. ( Wolf) ; Saline Co. ; Champaign 

 Co.; Peoria, Peoria (Jo. ; (^)uiver Lake, Havana, Mason Co. ; Cy- 

 press Creek, Johnson Co. ; Cedar Lake, Lake Co. ; Dug Hill and 

 Miller's Pond, Union Co. ; Washington Co.; Thompson's Lake, 

 Fulton Co. ; Pekin, Tazewell Co. ; Taylorville, Christian Vo. ; 

 Northern Illinois; Warsaw, Hancock Co. (State Laboratory). 



Planorhis trirolvis n/acrostmi/a Whiteaves. 



Desplaines River, Will Co. (Ferriss); Northern Illinois 

 (Marsh) ; Fox River and Algonquin, McHenry Co. (Nason). 



PlanorJiis tru/iccffus Miles. 



Cook Co. (Baker, Higley, .lenseii). 

 Planorhis snnipsoni Ancey. 



Athens, Menard Co., collected by E. Hall (Nautilus, IX., p. 

 36, 1895). 



Section Plunorhilla Haldeman. 

 Planorhis campanulatus Say. 



Cook Co. (Baker, Calkins, Higley): Northern Illinois (Calk- 

 ins) ; La Salle Co. (Calkins, Huett) ; Desplaines River ( Fer- 

 riss) ; Romeo and Joliet, Will Co. (Handwerk); Quincy, Adams 

 Co. (Hart); Winnebago Co. (Hinkley, Marsh); Crystal Lake, 

 McHenry Co. (Lyon) ; Silver and Crystal lakes and Algonquin, 

 McHenry Co. ( Nason ) ; McHenry Co. (Stearns); Southern Illi- 

 nois (Ulft'ers) ; Milan, Rock Island Co. ; Clear, Cedar, Sand, Fox, 



*The references to I'ldimrhix hnlxs Say from Illinois are extremely doiilitfnl, as it 

 is essentially a southern species. It is reported from the following localities: Winne- 

 liago Co. (Hinkley); Mercer Co. (Marsh). (See Nautilus, III., p. 2:'..) 



