THE NAUTILUS. 95 



Vertigo ovata Say. Apparently rare. 



Vertigo milium Gould. A few specimens came from Blue Mound. 



Vertigo tridentata Wolf. Our commonest Vertigo; found on 

 Blue Mound and in river drift at various places. 



Strohilops apnis Pilsbry. Common in woody places. 



Vullonia parvula Sterki. Very common where there is no shade. 



Vallonia costata Miiller. Drift specimens only have so far been 

 found. 



Cochlicopa luhrica Miiller. Common on Blue Mound. 



AgrioUmax campestris Say. Not common. 



Agriolimax agrestis Linnaeus. This is the common slug of Kansas. 



Vitrea rhoadsi Pilsbry. This form is rather common in the woods. 



Vitrea indentata umhilicata Cockerell. Abundant everywhere. 



Vitrea milium Morse. This species is associated with Z. minuscula, 

 but is less common in most places. 



Zonitoides arhorea Say. Abundant in all woods. 



Zonitoides nitida Miiller. Apparently a rare species and locally 

 distributed. I have found it only near Lake View. 



Zonitoides minuscula Binney. This species is common in open 

 woodlands. 



Zonitoides minuscula alachuana Dall. Found associated with the 

 typical form but less common. 



Zonitoides singleynna Pilsbry. A species of the open plains. 



Zonitoides nummus Vanatta. Found at Lake View and at Blue 

 Mound, in the woods on each occasion. 



Euconulus chersinus trochidus Reinhardt. Found in the wood- 

 lands with Z. nummus. 



Philomycus carolinensis Bosc. Rather common on Blue Mound. 

 A number of specimens have been taken. 



Pyramidula alternata Say. Abundant in wooded and rocky places. 



Pyraniidula asteriscus Morse. A few specimens have come from 

 Blue Mound and more from fiver debris at various places in the 

 county. 



Helieodiscus parallelus Say. This species lives in colonies around 

 the limestone bluflfs altogether. 



Helieodiscus eigenmanni Pilsbry. One specimen was picked out of, 

 drift from Lecompton; it probably washed there from farther west. 



Punctum pygmaeum Draparnaud. Apparently rare, as it has only 

 been found once, and then in river drift from Lawrence. 



