466 GEOLOGICAL SURVEY OF NEW JERSEY. 



Var. radiosa, Grun. 



Fresh water. Camden : Ditches and meadow pools near 

 Black wood. 



C. Kutzingiana (Thwaites?), Chauvin. 



Generally distributed along the coast Lewis. 



O. operculata, Kiitz. 



Fresh water. - Common in ponds and ditches. Gloucester : 

 Mullica Hill. Burlington : Marlton. Salem : Woodstown. 

 Atlantic : Absecon. Camden : Kirk wood. Morris : Fossil at 

 Drakesville. 



O. rotula, Kutz. 



Generally distributed along the coast Lewis. 



O. striata (Kutz.), Grun. 



Salt or brackish water. Monmouth : Ditches near Shark 

 River. Salem : Ditches near Salem Creek. Camden : Frequent 

 in the water-supply of Camden. 



ACTINOCYCLUS, Ehrb. 

 A. Ralfsii, W. Sm. 



Marine. Monmouth : Occasional in marine mud of Shark 

 River and Manasquan River. 



OOSOINODISOUS, Ehrb. 

 C. eccentricus, Ehrb. 



Salt or brackish water. Occasional between tide marks and 

 in marine mud. Monmouth : Manasquan River, Shark River ; 

 fossil in Ocean Beach clay. Atlantic : Atlantic City, and Cape 

 May. Camden : Rare in Camden water-supply. 



O. lineatus, Ehrb. 



Salt or brackish water. Occasional in the same localities as 

 the preceding species. 



O, nitidus, Greg. 



Marine. Monmouth : Occasional on the sand flats near the 

 mouth of Manasquan River. 



