CATALOGUE OF PLANTS. 461 



N. linearis (Ag.), W. Sm. 



Fresh water. Camden : Camden water-supply. Sussex : 

 Brook near iron mine at Andover. 



N. littorea, Grim. (N. thermalis (Kiitz.), Grun., var. ?) 



Marine. Monmouth : Occasional between tide marks at the 

 mouth of Shark River. 



N. longissima (Breb.), Ralfs. 



Marine. Monmouth : Abundant on sand flats in Shark River 

 and Manasquan River. 



N. marina, Grun. 



Marine. Same localities as the last. 

 N. obtusa, W. Sm. 



Marine. Generally distributed along the coast Lewis. 

 Var. flexella, H. L. S. 



Fresh or brackish water. Atlantic : Ditches near Absecon. 

 Monmouth : Abundant in a brook flowing into the south side of 

 Shark River ; Ocean Beach clay. Sussex : Old Furnace Pond, 

 Hamburg. 



Var. scalpelliformis, Grun. 



Brackish water. Cape May : Dennis Creek. 

 N. Palea (Kiitz.), W. Sm. 



Fresh water. Cape May : Ditches near Cape May Point. 

 Atlantic: Abundant in overflow from artesian well, Atlantic 

 City. 



N. panduriformis, Greg. 



Brackish water. Monmouth : Ditches near Shark River. 

 Var. continua, Grun. 



Brackish water. Monmouth : Pools near the mouth of Mana- 

 squan River. 



N. paradoxa (Gmelin), Grun. (Bacillaria paradoxa, Gmelin.) 



Brackish water. Monmouth : Ditches near the mouth of 

 Manasquan River. Hudson: Meadows near Hoboken Ed- 

 wards. Atlantic : Marshes near Atlantic City. Cape May : 

 Brackish marshes. 



N. plana, W. Sm. 



Marine. Generally distributed along the coast Lewis. 



