458 GEOLOGICAL SURVEY OF NEW JERSEY. 



S. bifrons, Ehrb. 



Fresh water. Frequent in ponds and meadow ditches. Cam- 

 den : Camden, Blackwood and Kirkwood. Salem : Woodstown 

 and Sharptown. Gloucester : Mullica Hill. Atlantic : Ham- 

 monton and Absecon. Morris: Fossil at Drakesville, and 

 Mon mouth : In clay at Ocean Beach. 



S. biseriata, Breb. 



Fresh water. Camden : Common in ponds at Kirkwood, and 

 Gloucester : Mullica Hill. 



S. cardinalis, Kitton. 



Freshwater. Gloucester: Common in ponds at Mullica Hill. 

 Atlantic: Absecon. Camden: Occasional in the water-supply 

 of Camden. 



S. elegans, Ebrb. 



Fresh water. Occasional in ponds and meadow ditches. 

 Camden : Camden and Blackwood. Atlantic : Absecon. Glou- 

 cester: Mullica Hill. Salem: Woodstown and Sharptown. 

 Morris : Fossil at Drakesville. Mon mouth : In clay at Ocean 

 Beach. 



S. fastuosa, Ebrb. 



Marine. Common all along the coast Lewis. 

 S. Pebigerii, Lewis. 



Brackish water. Monmouth : Common in the mud of brack- 

 ish ditchf s near the mouth of Manasquan River, and of Shark 

 River. Cape May : Marshes near Cape May Lewis. 



S. Gemma, Ehrb. 



Salt or brackish water. Monmouth : Marshes near the mouth 

 of Manasquan River. Atlantic : Marshes near Absecon. 



S. limosa, Bailey. 



Camden : Delaware River mud Lewis. 



S. linearis, W. Sm. 



Fresh water. Camden : Common in cranberry bogs near 

 Atco. 

 S. minuta, Breb. 



Fresh water. Common in ponds. Salem : Sharptown and 

 Woodstown. Gloucester: Mullica Hill. Sussex: Andover 

 and White Hall. 



