486 GEOLOGICAL SURVEY OF NEW JERSEY. 
N. aniphirhynchus, Ehrb. 
Fresh water. Salem: Common in meadow ditches near 
Woodstown, and Burlington: Marlton. 
N. amphisboona, 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. bicapitata, 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: 
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. 
