THE NAUTILUS. 27 



Vitrea indentata Say. Uncommon, Bethlehem. 



Vitrcea viridula Mke. (radiatula Alder). Rare, Bethlehem. 



ENUODONTIDJ*:. 



Pyramidula alternata Say. Common, Bethlehem. Specimens of 

 a creamy-white, lacking the usual markings, have been found on the 

 Monocasy Creek. 



Pyramidula striatella Anthony. Common, Bethlehem. 



Helicodiscus lineatus Say. Quarries and limey situations, Beth- 

 lehem. 



HELICID^E. 



Potygyra (Mesodon) thyroides Say. Frequent, Bethlehem. 



Polygyra (Mesodori) albolabris Say. Common, Bethlehem. 



Polygyra (Triodopsis) tridentata Say. Common, Bethlehem. 



Polygyra ( Triodopsis} introferens Bland. A single specimen (not 

 inflecta), Bethlehem. 



Polygyra (Stenotretna) monodon fraterna Say. Common, Beth- 

 lehem. 



Polygyra (Stenotrema) hirsuta Say. Common, Bethlehem. 



Vallonia pulchella Miill. Common, Bethlehem. 



Vallonia costata Miill. Not common, Bethlehem. 



Pupa armifera Say. Very common, Bethlehem. 



Pupa marginata Say (fallax Binney). Numerous in one locality, 

 Bethlehem. 



Pupa contracta Say. Common, Bethlehem. 



Pupa pentodon Say. One or two specimens, Bethlehem, W. L. 

 King. 



Pupa corticaria Say. Under bark of dead willow tree, Monocasy 

 Creek, rare, Bethlehem. 



Vertigo ovata Say. Rare, Bethlehem. 



Vertigo milium Gould. Two specimens, Bethlehem. 



FERUSSACID^E. 



Gochlicopa lubrica Miill. (Ferussao'a subcylindrica Anct.). t'lid^r 

 decaying leaves, woods north of Bethlehem. 



CaecilioneUa acicula Miill. Lehiph Mountain, conti^ii.ms to 

 Fountain Hill Borough, spreading from greenhouses; also found by 

 Mr. W. L. King in his yard in Bethlehem. 



