CATALOGUE OF PLANTS. 441 



N. producta, W. Sm. 



Fresh water. Atlantic : Common in Absecon Pond. 



N. pusilla, W. Sm. 



Fresh or brackish water. Atlantic: Brackish ditches near 

 Absecon and Pleasantville. Cape May: Ditches near Cape 

 May. 

 N. radiosa, Kiitz. 



Fresh water. Sussex : Frequent in ponds and ditches at 

 White Hall, Andover, and in the Musconetcong River at Water- 

 loo. 

 Var. acuta, V. H. 



Fresh water. Gloucester : Common in ponds and ditches at 

 Mullica Hill. Sussex: White Hall and Andover. Morris: 

 Lake Hopatcong and Drakes ville fossil deposit. 



N. retusa, Breb. 



Marine. Monmouth : Occasional between tide marks at the 

 mouth of Shark River. 



N. rhomboides, Ehrb. 



Fresh water. Generally distributed throughout the State. 

 Atlantic : Occurs in enormous quantities upon Utricularia and 

 other water plants in ponds at Hammonton, Absecon and Mays 

 Landing. Ocean : Toms River, and Cape May : Dennisville. 

 Particularly plentiful in cedar-swamp bogs and streams. 



Var. crassinervis, Breb. (Frustulia Saxonica, Rab.) 



Fresh water. Abundant in the same localities as the last- 

 named species. 



N. rhyncocephala, Kiitz. 



Fresh water. Camden : Occasional in the pond at Kirkwood, 

 and Atlantic : In the water from the artesian well at Atlantic 

 City. 



N. Schweinfurthii, A. S. 



Fresh water. Burlington : Occasional in old marl-pits at 

 Marl ton. 



N. semen, Ehrb. 



Fresh water. Burlington : Common in old marl-pits at 

 Marlton, and Gloucester : Mullica Hill. 



