e 11- I>e< i ring Mollusca. 



Luther. 



8. obKqua Sa; 



An abundant species attached to bits of deca 

 localities like the preceding. 



Family Pom atiopsi i. .1; 

 Genus Pomatiopsis. 

 P. hipidaria Say. 



Common along the borders of streams subjec 

 along with Z. nitida and Sucvinn, nrara. This 



Genus Limunn Lamark. 

 L. columella Say. 



L. casta Lea. 



A much smaller shell. Habitat the same and thought 1 

 be a variety of columella. 



