460 GEOLOGICAL SURVEY OF NEW JERSEY. 



C. spiralis, W. Sm. 



Fresh water. Rare in the blue clay of the Delaware River at 

 Philadelphia Lewis. 



NITZSCHIA, Hass. 

 N. Amphioxys, W. Sm. 



Fresh water. Common in ditches and meadows. 



N. angularis, W. Sm. 



Fresh water. Camden : Delaware River mud Lewis. 



N. birostrata, W. Sm. 



Marine. Generally distributed along the coast Lewis. 



fcT. Closterium (Ehrb)., W. Sm. 



Marine. Monmouth : Very abundant on flats at the mouth 

 of Shark River and at the mouth of Manasquan River. 



N. curvula, W. Sm. 



Fresh water. Atlantic : Occasional in ponds at Hammonton 

 and Absecon, and Ocean : Toms River. ' 



N. dubia, W. Sm. 



Brackish water. Atlantic: Marshes near Absecon. Mon- 

 mouth : Marshes near Shark River. 



N. elongata, Hantzsch. 



Fresh water. Gloucester : Occasional in Mullica Hill Pond. 



N. epithemioides, Grun. (Amphiprora latestriata, Breb.) 



Marine. Atlantic : Very abundant in a tidal pool near the 

 inlet at Atlantic City. 



N. fasciculata, Grun. (Homosodadia sigmoidea, W. Sm.) 



Brackish water. Salem : Abundant in brackish ditches near 

 Salem. Atlantic : Marshes near Absecon. Monmouth : Marshes 

 near Shark River. 



N. Heufleriana, Grun. 



* Fresh water. Morris : Rare in the Drakes ville deposit. 



N. hybrida, Grun. (N. bilobata, W. Sm., var.f) 



Marine. Monmouth : Occasional at the mouth of Shark 

 River. 



