436 GEOLOGICAL SURVEY OF NEW JERSEY. 



N. amphirhynchus, Ehrb. 



Fresh water. Salem : Common in meadow ditches near 

 Woodstown, and Burlington : Marlton. 



N. amphisbcena, Bory. 



Salt or brackish water. Monmouth : Abundant between tide 

 marks near the mouth of Manasquan River, and Atlantic : In 

 pools on the marshes near Atlantic City. 



N. apiculata, Breb. 



Marine. Monmouth : Rare in Shark River. 



N. arenaria, Donkin. 



Marine. Atlantic: Occasional in marsh pools at Atlantic 

 City. 



N. bioapitata, Lagerst. 



Fresh water. Common in meadow ditches. Sussex : An- 

 dover. Gloucester : Woodbury, Mullica Hill. 



N. borealis (Ehrb.), Kiitz. 



Fresh water. Widely distributed but never found in abund- 

 ance. Salem : Woodstown, Salem, Sharptown. Burlington r 

 Marlton. Gloucester: Mullica Hill, Barnsboro, Woodbury. 

 Atlantic : Hammonton, Absecon. Sussex : Hamburg, An- 

 dover. Morris : Fossil at Drakesville. 



N. Brebissonii, Kiitz. 



Fresh water. Burlington : Occasional in ponds at Marlton,. 

 and Camden : Kirkwood. 



N. brevis, Greg. 



Marine. Monmouth : Common on sand flats near the mouth 

 of Manasquan River. 



N. brevistriata, Grun. (N. gibba, var.) 



Fresh water. Camden : Common in cranberry bogs near 

 Ancora. 



N. crabro, Ehrb. 



Marine. Cape May : Occasional at Cape May. 



N. cruciformis, Donkin. 



Marine. Monmouth : Occasional in Shark River. 



