THE NAUTILUS. 69 



PELECTPODA. 



Anodontoides ferussacianus subcylindraceus ( Lea ). Roaring 

 Brook. 



Anodonta marginata Say. Farmington River, above dam. 



Alasmidonta undulata (Say). Mill race, near dam ; Roaring 

 Brook. 



Unio complanatus (Sol.). Mill race, near dam ; Roaring Brook ; 

 Pond's Brook. 



Margaritana margaritifera (Linne). Pond's Brook. 



Pisidium subrotundum Sterki. Small pools in swamp ; Cherry 

 Pond Creek. 



GASTROPODA. 



Campeloma decisum (Say). Roaring Brook ; Farmington River, 

 above dam. 



Physa sayii Tappan. Overflow from mill race ; Cherry Pond ; 

 small stream flowing into Farmington River above dam. , 



Planorbis bicarinatus Say. Cherry Pond ; small streams above 

 dam, Farmington River. 



Segmentina armigera (Say). Cherry Pond ; drainage ditch east 

 of Cherry Pond Creek (on bottom in grass). 



Lymnaea columella (Say). Cherry Pond. 



Strobilops labyrinthica (Say). Top of hills, east of Farmington 

 River. 



Succinea ovalis Say. Lewis' Woods. 



Succinea avara Say. Lewis' Woods. 



Philomycus carolinensis (Bosc.). Cherry Park, under log. 



Helicodiscus parallelus (Say). Top of hills, east of Farmington 

 River. 



Zonitoides arborea (Say). Woods east of Roaring Brook ; 

 Cherry Park ; top of hills east of Farmington River. 



Zonitoides nitida (Miiller). Near Curtis' Pond. 



Euconulus fulvus (Miiller). Top of hills, east of Farmington 

 River. 



Vitrea indentata (Say). Top of hills, east of Farmington River. 



Vitrea bammonis (Strom.). Woods east of Roaring Brook ; 

 Cherry Park. 



Polygyra hirsuta (Say). Top of hills, east of Farmington River ; 

 woods east of Roaring Brook. 



Polygyra fraterna (Say). Lewis' Woods. 



Polygyra albolabris (Say). Woods east of Farmington River. 



