ENDODONTIDAE 85 



Anguispira alternata carinata (Pilsbry & Rhoads). Fig. B. 

 In Union, Pope, White, Hardin and Gallatin counties, a form 

 of Anguispira alternata occurs which has a carinated periphery 

 and a low spire. This form, carinata, is found near the Ohio 

 and Mississippi rivers, in the hills and on the limestone blufiFs. 

 It is not so abundant as the typical form. In the southern part 

 of Illinois there is a tendenc>' for the shell of alternata to become 

 carinated on the periphery, even when the spire is high. 



* 



ANGUISPIRA KOCHI (Pfeiffer)'^ 



The banded snail Anguispira kochi is easily recognized by 

 the two stripes of dark brown which encircle the yellowish shell 

 near the periphery. The shell, measuring an inch or more (25- 

 28 mm.) in diameter, has a wide 

 and deep umbilicus. The surface 

 sculpture is not so coarse as that 

 of Anguispira alternata. 



Shells of young Polygyra pro- 

 funda might be confused with 

 those of Anguispira kochi, except 

 that the Polygyra shells have only 



one wide color band above the periphery and several very nar- 

 row stripes below. The adult of Polygyra profunda has a 

 turned-over lip, while Anguispira kochi has a lip that is sharp 

 and thin. 



Anguispira kochi, distributed over the greater part of Illi- 

 nois, appears to be absent from far northern counties. The 

 most northern Illinois record is from southwestern Cook 

 County. From this locality southward it is found in scattered 

 places, in some habitats abundantly, in others sparingly. 



The natural habitat of this species is the more heavily 

 wooded ravines of river tributaries or the banks and bluffs of 

 the large rivers. It is associated with oak, elm, hickory, locust, 

 cherry and even pine. Like other land snails, it is largely noc- 

 turnal in habit and is active only at night and on dark days. 



This species was formerly known as Pyramidula solitaria 

 (Say), but the designation was changed because the name kochi 

 was published at an earlier date. 



A common land snail of the Mississippi and Ohio valleys, 

 Anguispira kochi ranges from central Michigan to Arkansas. 



