195 



Limiirea. 

 L. columella. } Found at Lcggs-liill pond, and in 



L. macrostoma. j Flax pond. 

 L. elodes. \ 



L. umbilicata. > In ditches and l)rooks in Great Pasture. 

 L. modicellus. ) 



Paludina. 

 P. decisa. Found in Flax, .Spring and Floating-bridge 

 ponds. 



P. lieterostroplia. In Spring pond, a single specimen. 



Amnicola. 

 A. porata. Found in ponds, brooks and ditches. 



Natica. 

 X. heros. At Salem harbor, and at Lynn. 

 X. triseriata. In City Mill-pond. 

 X. duplicata. In Mill-pond and at Lynn. 

 X. clausa. In fishes' stomach at Swampscott. 

 X. pusilla. Found living, at Swampscott. 

 X. immaculata. Plenty at Swampscott. 

 X. flava. Found in the stomach of a liaddock. My shell 

 differs from Dr. Gould's description. 



Yelutina. 



^r' ^^ "" In stomachs of fishes and on beaches. 

 V. zonata. \ 



Sigaretus. 

 S. haliotoideus. From fishes' stomachs at Swampscott. 



Vermetus. 

 V. lumbricalis. Cast on shore on the beaches. 



Skenea. 



S. serpuloides. Found on the shores of Salem Harbor, 



• just below low-water mark. 



Scalaria. 



S. Grcenlandica. \ Yqxxw^ in stomachs of fishes at 



fe. Imeata. > ^ , , 



^, i>- J. • , V Swampscott. 



h. multistriata. ) ^ 



Margarita. 

 M. chierea. Alive at Phillips Beacli and from stomachs 

 vof fishes. 



\^' ^^^^^Y^' / Found at Swampscott in the stom- 



M. undulata. > i ^ ^ i 



n.r , , I achs 01 fishes. 



M. argcntata. ) 



