CATALOGUE OF PLANTS. 435 



S. anceps, Ehrb. 



Fresh water. Common in meadow ditches. Salem : Woods- 

 town, Sharptown, Salem. Burlington : Marlton. Camden : 

 Camden, Kirkwood. Sussex : Culver's Gap, Andover. Morris : 

 Lake Hopatcong, Budd's Lake. Cape May : Ditches near Cape 

 May Point. 

 Var. amphicephala, Kiitz. 



Fresh water. Monmouth : Common in Lake Como. 

 S. aspera (Ehrb.), Kiitz. 



Marine. Monmouth : Common in Manasquan River, Shark 

 River and Barnegat Bay ; fossil in clay at Ocean Beach. 



S. gracilis, Ehrb. 



Fresh water. Common in ponds and meadow ditches. Cam- 

 den : Camden, Blackwood. Burlington : Marlton, Pemberton. 

 Salem : Woodstown, Sharptown. Gloucester : Mullica Hill. 

 Sussex : Andover, White Hall, Hamburg. Morris : Fossil at 

 Drakesville. 



S. Phcenicenteron, Ehrb. 



Fresh water. Common in ponds and meadow ditches through- 

 out the State. Fossil at Drakesville. 



S. salina, W. Sm. 



Marine. Monmouth : Common in Shark River, Manasquan 

 River, and in marsh pools near Absecon. 



NAVICULA, Bory. 

 N. acrosphhaeria, Breb. 



Fresh water. Burlington : Frequent in old marl-pits near 

 Marlton. 



N. affinis, Ehrb. 



Fresh water. Monmouth : Common in meadow ditches near 

 Long Branch, and Salem : Woodstown. 



N. Americana, Ehrb. 



Fresh water. Morris : Fossil at Drakesville. 

 N. amphigomphus, Ehrb. (N. iridis, var.) 



Fresh water. Common in ponds and ditches. Burlington : 

 Marlton, Ewansville, Pemberton. Atlantic : Absecon. Mon- 

 mouth : Ocean Beach clay. 



