218 PRELIMINARY CATALOGUE OF PLANTS. 



O. tumidum, Lund. Split Rock Pond. 

 C. tetrophthalmum, Kg. Frequent. 

 C. Turpinii, Breb. Not rare. 



Xanthidium, Ehrb. 



X. aculeatum, Ehrb. Lake Hopatcong, etc. 



X. armatum, Breb. Hammonton, Pleasant Mills, etc. 



X. antilopaeum, Kg. Frequent. 



X. cristatum, Breb. Hammonton. 



X. fasciculatum, Ehrb. Frequent. 



Arthrodesmus, Ehrb. 



A. convergeus, Ehrb. Frequent. 

 A. fragilis, Wolle. Hammonton, etc. 

 A. incus, Hass. Hammonton, etc. 

 A. octocornus, Ehrb. Hammonton, etc. 



Buastrum, Ehrb. 



E. ampullaceum, Ralfs. Frequent. 

 E. attenuatum, Wolle. Budd's Lake. 

 E. abruptum. 



Var. evolutum, Nordt. Tom's River. 

 E. affine, Ralfs. Frequent. 

 E. binale, Ralfs. Frequent. 



Var. insulare, Wittr. Frequent. 

 E. crassum, Breb. Frequent. 

 E. circulare, Hass. Frequent. 

 E. Didelta, Turp. Frequent. 

 E. elegans, Breb. Common. 

 E. formosum, Wolle. Tom's River. 

 E. gemmatum, Breb. Split Rock Pond. 

 E. humerosum, Ralfs. Frequent. 

 E. insigne, Hass. Frequent. 

 E. intermedium, Cleve. Dennisville. 

 E. oblongum, Ralfs. Not rare. 

 E. pectinatum, Breb. Not rare. 

 E. Ralfsii, Rabh. Not rare. 

 E. rostratum, Ralfs. Not rare. 

 E. pinnatum, Ralfs. Not rare. 

 E. spinosum, Ralfs. Not rare. 



Micrasterias, Ag. 



M. arcuata, Bail. Pleasant Mills, etc. 

 M. Americana, Ralfs. Frequent. 

 Var. recta, Wolle. Dennisville. 



