448 GEOLOGICAL SURVEY OF NEW JERSEY. 

 ACHNANTHE^E. 



ACHNANTHBS, Bory. 

 A. brevipes, Ag. 



Marine. Monmouth : Abundant on algae in Shark River, 

 Manaequan River, Barnegat Bay, Shrewsbury River, and At- 

 lantic : Bay at Atlantic City. Most abundant in August. 



A. linearis, W. Sm., forma curta, Grun. (Achnanthidium Unearis, W. Sm.) 

 Freshwater. Caraden : Abundant in an aquarium at Elm. 



A. longipes, Ag. 



Marine. It is doubtful whether this species is distinct from 

 A. brevipes. It occurs in the same localities and associated 

 with it. 



A. parvula, Kiitz. 



Marine. Monmouth : Occasional in tidal pools near Mana- 

 squan River and Cape May. 



A. subsessilis, Ehrb. 



Marine. Frequent in the same localities as the last-named 

 species. 



COCCONIDE^E. 



COCCONBIS, Ehrb. 



0. dirupta, Greg., var. flexella, Grun. 



Marine. Monmouth : Rare in Manasquan River. 



O. excentrica, Donkin. 



Marine. Monmouth : Abundant in sand ripples between tide 

 marks at the mouths of Shark River and Manasquan River. 



O. lineata (Ehrb.), Grun. 



Brackish water. Cape May : Occasional in Dennis Creek. 



O. molesta, Kiitz. 



Fresh water. Sussex : Culver's Gap. 



C. Pediculus, Ehrb. 



Fresh water. Abundant. Parasitic upon water plants in 

 brooks and ponds throughout the State. Fossil at Drakesville, 



