452 GEOLOGICAL SURVEY OF NEW JERSEY. 
DIMEREGRAMMA, Ralfs. 
D. marinum (Greg.), Ralfs. 
Marine. Monmouth: Rare in mud at the mouth of Shark 
River. 
RHAPHONKSIS, Hhrb. 
R. Amphiceros, Ehrb. 
Marine. Common all along the coast in the mud at the 
mouths of rivers and inlets and in tidal pools. 
Var. rhombica, Grun. 
Cape May: Occasional in brackish water of Dennis Creek. 
SYNEDRA, Ebrb. 
S. affinis, Kiitz. 
Marine and brackish water. Ocean: Very common in Bar- 
negat Bay. Cape May: Marshes near Cape May—Lewis. 
Var. tabulata (Kiitz.), V. H. (S. tabulata, Kitz.) 
Marine and brackish water. Cape May: Common near Cape 
May. 
S. capitata, Ehrb. 
Fresh water. Sussex: Hewitt’s Pond near Andover. Mor- 
ris: Fossil in the Drakesville deposit. 
S. fulgens (Kitz.), W. Sm. 
Marine. Abundant on marine alge. Monmouth: Shark 
River, Manasquan River, Shrewsbury River. Ocean :. Barnegat 
Bay. 
8. gracilis, W. Sm. 
Marine. Common all along the coast—Lewis. 
S.(?) nitzschioides, Grun. (Thalassiothrizx, Grun.) 
Marine and brackish water. Monmouth: Occasional in 
brackish water of Lake Como. 
8S. pulchella, Kiitz. 
Fresh water. Abundant on water plants. Monmouth: Lake 
Como. Sussex: Andover. Burlington: Marlton. 
Var. Smithii, Ralfs. 
Fresh water. Common on water plants. Same localities. 
