CATALOGUE OF PLANTS. 459 



S. Molleriana, Grun. 



Fresh or brackish water. Monmouth : Fresh- water ditches 

 near Shark River and Lake Como. Atlantic : Brackish pools 

 near Absecon. 



S. ovalis, Breb. 



Fresh or brackish water. Monmouth : Common in ditches 

 running into Lake Como and Shark River. Atlantic : Brackish 

 ditches near Absecon. Cape May : Cape May and Dennisville. 



S. ovata, Kiitz. 



Fresh water. Common in ponds and ditches. Burlington : 

 Marlton. Camden : Kirkwood. Occasional in Camden water- 

 supply. Salem : Woodstown. Gloucester: Mullica Hill. 



S. pinnata, W. Sm. 



Fresh water. Sussex : Common in springs and ditches at 

 Andover and Culver's Gap. 



S. salina, W. Sm. 



Marine. Generally distributed Lewis. 

 S. splendida, Ehrb. 



Fresh water. Common in meadow pools and ditches. 

 S. striatula, Turp. 



Salt or brackish water. Monmouth : Common in the mud of 

 brackish ditches near the mouth of Manasquan River ; mud of 

 ditches near the mouth of Shark River. Atlantic : Meadow 

 pools near Atlantic City. Cape May : Cape May, and mud of 

 Dennis Creek. 



S. tenera, Greg. 



Fresh water. Gloucester : Occasional in pond at Mullica 

 Hill. Camden : In Camden water-supply. 



CAMPYLODISCUS, Ehrb. 

 C. costatus, W. Sm. 



Camden : Rare in Delaware River mud Lewis. 



* 

 C. cribrosus, W. Sm. 



Salt or brackish water. Monmouth : Ocean Beach clay; mud 

 of brackish ditches near the mouth of Manasquan River. Blue 

 clay of the Delaware River at Philadelphia Lewis. 



