CATALOGUE OF PLANTS. 417 



D. Trabecula (Ehrb.), Nseg. 



D. truncatum, Breb. 



D. Baculum (Breb.), De By. 



D. coronatum, Rab. 



D. coronulatum, Grun. 



D. constrictum, Bail. 



D. nodosum, Bail. 



D. repandum, Wolle. 



D. dilatatum (Cleve), Lund. 



All frequent in ponds throughout the State. 

 D. sinuosum, Wolle. 



Burlington : Brown's Mills. 

 Var. breve, Wolle. 



Same locality. 

 D. undulatum, Bail. 



Cape May: Dennisville, and Atlantic : Hammonton. 

 D. spinosum, Wolle. 



Cape May : Dennisville. 

 D. verrucosum (Bail.), Ralfs. 



In quiet waters, northern parts of the State. 

 D. tridentulum, Wolle. 



Burlington : Brown's Mills, Pleasant Mills. 

 D. minutum, Ralfs. 



In ponds. 



D. costatum, Wolle. 

 D. verticillatum, Bail. 

 D. gracile, Bail. 



All frequent in ponds throughout the State. 



CALOCYLINDRUS, De By. 



C. Ralfsii (Kutz.), Kirch. (Cosmarium cylindricum, Ralfs.) 



In ponds ; frequent. 

 O. Cucurbita (Breb.), Kirch. 



Same habitat. 



2B 



