CATALOGUE OF PLANTS. 437 
. cryptocephala, Kiitz. 
Fresh water. Frequent in ponds and ditches, Gloucester : 
Mullica Hill, Woodbury. Burlington: Marlton. Sussex: 
Hamburg, Andover, White Hall. 
. cuspidata, Kiitz. 
Fresh water. Common in meadow ditches. Camden: Laurel 
Mills, Kirkwood, Gloucester. Salem: Woodstown, Sharptown. 
Burlington: Marlton. 
. cyprinus (Ehrb.), W. Sm. 
Marine. Monmouth: Occasional in Manasquan River. At- 
lantic: Common at Atlantic City, and Cape May :—Lewis. 
. didyma, Ehrb. 
Marine, Monmouth: Common in Manasquan and Shark 
Rivers; Ocean Beach clay. Cape May: Ditches near Cape 
May—Lewis. 
N. dilatata, Ehrb. 
Fresh water. Common in ponds throughout the State. 
Fossil at: Drakesville. 
. divergens, W. Sm. 
Fresh water. Burlington: Frequent in old marl-pits near 
Marlton, 
. elegans, W. Sm. 
Brackish water. Common in pools on the salt marshes. 
Monmouth: Shark River. Atlantic: Absecon. 
. elliptica, Kiitz. 
Salt, brackish or fresh water; common. Monmouth: Mana- 
squan River, Shark River; Ocean Beach clay. Camden: 
Camden water-supply. Gloucester: Mullica Hill. Salem: 
Woodstown, Sharptown. Burlington: Pemberton, Marlton. 
Cape May: Ditches near Cape May Point, Dennis Creek. 
N. firma, Kiitz. 
Fresh water. Common in ponds throughout the State. 
Var. subampliata, Grun. 
Fresh water. Atlantic: Frequent in the pond at Hammon- 
ton, and Monmouth: In Lake Como. 
