56 



In 1898 Mr. John W. Huett published a volume on "The 

 Natural History of La Salle County, Illinois," in which (Part 

 II., p. 96) 92 species of land and fresh-water shells are listed. 



In 1898 1902 Mr. Frank C. Baker published a report on 

 "The Mollusca of the Chicago Area", in which 164 species are 

 recorded for Cook, Dn Page, and Will counties. 



In addition to these more or less extensive lists, numerous 

 papers have been published in which Illinois shells are men- 

 tioned, and also quite a number which are devoted to critical 

 remarks or notes on the geographic distribution or economic 

 value of Illinois mollusks. The works of Binney, Bland, Con- 

 rad, Haldeman. Kiister. Lea, Pilsbry, Prime, Say, Simpson, Ster- 

 ki, Tryon, and Walker contain many references to Illinois spe- 

 cies, as well as descriptions of some species new to science. 



There have been twenty-eight species and varieties new to 

 science described from Illinois specimens. These are as fol- 

 lows: 



I'nio iijisimi Marsh. Mercer County. 

 iSjilinriiiiii llh/rasliensc Baker. Lilycash Creek. 



" nldviineinn forficxi Baker. Matanzas Lake. 

 Miiscnlniin liodgsovl Sterki. Albion. 

 Coriieori/das Iiandwcrki Sterki. Lilycash Creek. 



" riijnri Sterki. Higginbotliani's Sprinp;, Joliet. 



< 'a»i]>el<i)iia suh>iiil>(him Anthony. Illinois. 

 Atiiidcolii pilshriji Walker. Rockford. 

 Pijnjulojmis mississippieusix Pilsbry. Mississippi Eiver, near Rock River. 



" walariforvus Wolf. Tazewell Co. shore, Illinois River. 



Plenrocrrn li'trisii Lea. Peoria. 



" inoiiiUferum Lea. Ohio River, near its mouth, in Illinois. 



GoniobasiK (/rosiTiiorii Lea. Fox River. 

 Phyxa hildrethiaiia Lea. A lake in Illinois. 



" I'Imignta Say. Shores of Illinois. 



LymnHii lazeirelllana Wolf. Tazewell Co. shore, Illinois River. 

 :' . " vootlrufii Baker. Lake Michigan. 



,. " /«)Twt.s'ii Baker. Joliet. 



" mfflabu Calkins. Calumet River, Chicago. 



" i-eflexa jolielenxix Baker. Joliet. 



" reflexa cn/.ildllemix Baker. Crystal Lake, '• 



Vallonia parvuhi .Sterki. Joliet. 

 Zonites iiimni! Calkins. Rockford. 

 I'eiiit/o Iridnilatd Wolf. Canton. 



