446 GEOLOGICAL SURVEY OF NEW JERSEY. 
COLLETONEMA, Breb. 
C. eximium, Thwaites. 
Fresh or brackish water. Salem: Ditches near Salem. 
C. vulgare, Thwaites. 
Fresh water. Monmouth: Lake Como. 
BERELEYA, Grev. 
B. fragilis, Grev. 
Marine. Monmouth: Abundant on eel-grass in Shark River, 
and Atlantic: In the bays near Atlantic City. 
GOMPHONEM. 
GOMPHONEMA, Ag. 
G. acuminatum, Ehrb. 
Fresh water. Common on water plants in ponds and ditches. 
Gloucester: Mullica Hill. Salem: Sharptown. Burlington: 
Marlton and Pemberton. Morris: Lake Hopatcong. Sussex: 
Andover, Hamburg, Culver’s Gap and Musconetcong River. 
Var. laticeps, V. H. 
Fresh water. Camden: Common in Kirkwood Pond. 
G. affine, Kiitz. 
Fresh water. Burlington: Common in pond near Marlton. 
G. angustatum (Kiitz.), Grun. 
Fresh water. Salem: Common in ponds at Sharptown and 
Woodstown. 
G. Augur, Ehrb. 
Fresh water. Common in ponds. Salem: Sharptown. 
Camden: Kirkwood. Sussex: Hamburg and Andover. 
G. capitatum, Ebr. 
Fresh water. Camden: Common in Kirkwood Pond. 
G. constrictum, Ehrb. 
Fresh water. Common in ponds and ditches. Gloucester : 
Mullica Hill. Salem: Woodstown, Sharptown. Morris: Lake 
