420 GEOLOGICAL SURVEY OF NEW JERSEY.' 



O. taxichondrum, Lund. 



Ponds in the northern counties ; frequent. 

 C. pseudotaxichondrum, Nordst. 



Burlington : Brown's Mills. 

 O. anisochondrum, Nordst. 



Morris : Denmark and other ponds. 

 O. Kitchellii, Wolle. 



Atlantic : In a pond near Hamraonton Rev. H. D. Kitchell. 

 C. trachypleurum, Lund. 



Frequent in ponds. 

 C. triplicatum, Wolle. 



Same habitat. 

 C. margaritiferum, Menegh. 



Same habitat. 

 C. Botrytis, Menegh. 



Very common in ponds. 

 C. Brebissonii, Menegh. 



Atlantic : Frequent. 

 C. conspersum, Kalfs. 



In ponds ; frequent. 

 C. tetraophthalmum (Kutz.), Breb. 



Same habitat. 

 C. dentatum, Wolle. 



Cape May : Dennisville. 

 C. portianum, Archer.* 



In ponds ; frequent. 

 C. orbiculatum, Ralfs. 



Same habitat. 

 C. excavatum, Nordst. 



Same habitat. 

 C. amcenum, Breb. 



Atlantic : Hammonton. 



* Erroneously spelled Porterianum in the Preliminary Catalogue. 



