462 GEOLOGICAL SURVEY OF NEW JERSEY. 
N. reversa, W. Sm. 
Rare in marshes on the lower Delaware—Lewis. 
N. scalaris (Ehrb.), W. Sm. : 
Fresh or brackish water. Cape May: Fresh-water ditches 
near Cape May Point. Monmouth: Fresh-water brook run- 
ning into Shark River, and brackish ditches near Shark River. 
Atlantic: Egg Harbor River at Mays Landing; brackish 
ditches near Absecon. 
N. Sigma, W. Sm. 
Marine. Common. Monmouth: Shark River, Manasquan 
River. Atlantic: Atlantic City. 
Var. rigidula, Grun. 
Brackish water. Atlantic: Absecon. Monmouth: Shark River. 
N. sigmoidea (Ehrb.), W. Sm. 
Fresh water. Common in ponds and ditches. 
N. spathulata, W.Sm. (WN. hyalina, Greg.) 
Salt or brackish water. Atlantic: Marshes near Atlantic 
City, and Cape May—Lewis. 
N. virgata, Roper. 
Marine. Monmouth: Frequent in sand ripples near the 
mouth of Shark River. 
N. vivax, Hantzsch. 
Marine. Monmouth: Common in sand ripples near the 
mouth of Shark River. Atlantic: Tidal pools near inlet at 
Atlantic City. Cape May: Abundant on the beach at Cape 
May. 
Tribe 3-CRYPTO-RAPHIDIESA. 
MELOSIREZ. 
MELOSIRA, Ag. 
M. Borrerii, Grev. 
Marine or brackish water. Monmouth: Abundant on piling 
at the mouth of Manasquan River, and in Shrewsbury River. 
M. distans, Kiitz. 
Fresh water. Common. Camden: Blackwood. Sussex : 
Hamburg and Culver’s Gap. 
