OF THE MOLLUSC A OP IOWA. 69 



Mesodon profanda Say. Central and eastern Iowa : 

 quite common; often associated with M. clausus and M. 

 albolabris on moist hillsides, and also clingins: to the trunks 



' O O 



of trees. 



Vallonia pulchella Miiller. Common at Iowa City and 

 elsewhere in eastern Iowa. In, the central portion of the 

 state it has not as yet been found living, though it occurs 

 quite abundantly in the loss of that region. 



Family PUPID^E. 



Pupa pentadon Say. Iowa generally, but not very com- 

 mon. 



Pupafallax Say. Iowa City : not common. This spe- 

 cies is said to range westward to Nebraska and will doubt- 

 less be found in other Iowa localities. 



Pupa armifera Say. Davenport, Burlington, Des 

 Moines : very abundant. 



Pupa conlracta Say. Quite common throughout the 

 state. 



Pupa corticaria Say. Eastern Iowa : rare. This spe- 

 cies together with .P. armifera, P. pentadon, P. muscorum 

 and other congeneric forms are found in the loss. P. mus- 

 corum, though having a wide geographical distribution, has 

 not yet been recognized living in the state. 



Vertigo ovata Say. A Vertigo occurring at Iowa City 

 has been referred to this species, but its specific identity 

 in not perfectly satisfactory. 



Vertigo gouldi Binney. Not uncommon in the eastern 

 portion of the state. 



Family STENOGYRID^E. 



Ferrussacia subcylindrica L. Des Moines, Forest City, 

 Iowa City and elsewhere : rather common. 



ESSEX INST. BULLETIN, VOL. XX. 5* 



