448 GEOLOGICAL SURVEY OF NEW JERSEY. 
ACHNANTHEZ. 
ACHNANTHES, Bory. 
A. brevipes, Ag. — 
Marine. Monmouth: Abundant on alge in Shark River, 
Manasquan River, Barnegat Bay, Shrewsbury River, and At- 
lantic: Bay at Atlantic City. Most abundant in August. 
A. linearis, W.Sm., forma curta, Grun. (Achnanthidium linearis, W. Sm.) 
Fresh water. Camden: 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. 
COCCONIDEZ. 
COCCONEIS, Ehrb. 
C. dirupta, Greg., var. flexella, Grun. 
Marine. Monmouth: Rare in Manasquan River. 
©. excentrica, Donkin. 
Marine. Monmouth: Abundant in sand ripples between tide 
marks at the mouths of Shark River and Manasquan River. 
C, lineata (Ehrb.), Grun. 
Brackish water. Cape May: Occasional in Dennis Creek. 
C. molesta, Kiitz. 
Fresh water. Sussex: Culver’s Gap. 
©. Pediculus, Ehrb. 
Fresh water. Abundant. Parasitic upon water plants in 
brooks and ponds throughout the State. Fossil at Drakesville, 
