144 ILLINOIS ACADEMY OF SCIENCE. 



Page I GO. — Physa gyrina oleocea, Tryon, is the young of Physa 

 gyrina. 



Add the following : 



Page I02. — Ancylus hinkleyi, Walker. Golconda, Pope county ; 

 Elizabethtown, Hardin county (Hinkley). 



Add the following: 



Page 103. — Lymnaea^ columnella casta, Lea. Mercer county 

 (Marsh). 



Page 103. — Lymnaea obriissa plica. Lea, should read L, 

 obrussa exigua, Lea. 



Page 103. — Lymnaea obrussa modicella should read L. humilis 

 modicella. 



Page 104. — Lymnaea sterkii should read L. parva sterkii. 



Page 104. — Lymnaea humilis should read L. humilis modicella. 



Page 104. — Add : Lymnaea humilis rustica, Lea. Joliet, Will 

 county (Ferriss). 



Page 104. — Lymnaea catascopiuiii. pinguis is a synonym of 

 catascopiwn. 



Page 105. — Lymnaea capcrata umbilicata is a synonym of 

 caperata. The true umbilicata has not yet been found in Illinois. 



Page 105. — Lymnaea palustris michiganeiisis, Walker, is the 

 immature form of Lymnaea elodes, Say. Lake Villa, Cedar Lake, 

 Lake county; Bowmanville, Cook county (Baker) ; Joliet, Will 

 county (Ferriss) ; sloughs of Winnebago county (Hinkley) ; 

 Wolf Lake, near Chicago ; North Branch of Chicago River, Chi- 

 cago (Jensen) ; Mason county (Nason) ; Quiver Creek, Mason 

 county (State Laboratory) ; Bristol, Kendall county (Walcott) ; 

 Havana, Mason county (Walker) ; Northwest and Calumet 

 Lake, in ditches, Cook county ; creek near Bangs Lake, Wau- 

 konda. Lake county (Woodruff). 



Page 106. — Lymnaea reflexa jolietensis should read Lymnaea 

 elodes jolietensis, Baker. Additional records : Berry Lake, Cook 

 county (Higley) ; south of Wolf Lake, Cook county (Jensen). 



Page 105. — Lymnaea exilis, Lea. 



Page 106. — Lymnaea Kirtlandiana, Lea. Mud Lake, Grand 

 Crossing, Chicago, Cook county (Baker) ; Berry Lake, Cook 

 county (Higley) ; Crystal Lake, McHenry county (Nason). 



Page 106. — Lymnaea reflexa iowaensis, Baker, and Lymnaea 

 reflexa crystalensis, Baker, are immature forms of reflexa. 



Page 105. — Lymnaea pallida, Adams, is to be taken from the 



» See the writer's monograph, Special Bulletin 3, The Chicago Academy of Sciences. 



