426 GEOLOGICAL SURVEY OF NEW JERSEY. 



M. truncata (Corda), Ralfs. 



Same habitat ; common. 

 M. triangularis, Wolle. 



Monmouth : Ocean Beach. 

 M. Jenneri, Ralfs. 



M. laticeps, Nordst. (M. disputata, Wood.) 

 M. oscitans, Ralfs. 

 M. pinnatifida (Kiitz.), Ralfs. 



All frequent or occasional in ponds. 

 M. Kitchellii, Wolle. 



Cape May : Dennisville. 

 M. arcuata, Bail. 



Atlantic : Pleasant Mills ; and elsewhere in the southern 

 counties. 



M. expansa, Bail. 



With the preceding species. 

 M. Baileyi, Ralfs. 



Mercer : In pond, Princeton. 

 M. foliacea, Bail. 



Morris : Denmark Pond. 

 M. muricata, Bail. . 



In ponds; occasional. 

 M. apiculata, Menegh. (M. mucronata, Prelim. Cat.) 



Same habitat. 



STAURASTRUM, Meyen, 

 S. muticum, Breb. 



Frequent in ponds. 

 S. orbiculare (Ehrb.), Ralfs. 



Same habitat. 

 S. majusculum, Wolle. 



Passaic: Longwood Pond. 

 S. dejectum, Breb. 



Ponds; common. 

 S. megacanthum, Lund. 



