606 GEOLOGICAL SURVEY OF NEW JERSEY. 

 HAPALOSIPHON, 



H. Braunii, Kiitz. 



Atlantic : In ponds, on submerged plants, Atsion and Hana- 

 ro on ton. 



H. Brebissonii, Kiitz. 



In similar situations ; frequent. 



H. fuscescens, Kiitz. 



Frequent in ponds. 



H. temiissimus, Grun. 



Ponds and wet ground ; frequent. 



NOSTOCE^E. 



NOSTOO, Vauch. 



(A fresh-water genus.) 

 N. comminutum, Kiitz,. 



On pond-waters ; frequent. 



N. commune, Vauch. 



On wet ground ; common. 



N. sphsericum, Vauch. 



On wet rocks ; abundant. 



N. rupestre, Kiitz. 



On moist rocks ; frequent. 



N. caeruleum, Lyngb. 



In ponds and on dripping rocks. 



N. pruniforme, Ag. 



In ponds ; frequent. 



N. alpinum, Kiitz. (N. cristatum, Bailey.) 



Bergen : Dripping rocks, Palisades. 



, Bory. 

 A. flos-aquae, Kutz. 



On stagnant fresh water ; common. 



