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. (N. hyalina, Greg.) 



Salt or brackish water. Atlantic : Marshes near Atlantic 

 City, and Cape May Lewis. 

 N. virgata, Koper. 



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-RAPHIDIE^E. 



MBLOSIRA, 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. 



