AMNICOLA. 53 



3. AMNICOLA PALLIDA, HaUeman. 



Hald., p. 12, t. 1, fig. 7. 



Additional localities, Kennebec River, 

 Maine ; Little Lakes, New York. 



The shell is not so transverse as limosa, and 

 the umbilicus is much narrower than in that 

 species. 



4. AMNICOLA DECISA, Haldeman. 

 Hald., p. 7, t. 1, figs. 2, 3. 



This species has been detected in the Sus- 

 quehanna, Schuylkill and Potomac Rivers. 

 The smaller size and nearly imperforate base 

 will distinguish it from the preceding. 



5. AMNICOLA GALBANA, Haldeman. 

 Hald., p. 15, t. 1, fig. 9. 



This species only occurs fossil at White 



Pond, in Sussex County, New Jersey. It 



should not have been included in Haldeman's 



Monograph. 



(34) 



