12 



HELMINTHOCLADIACEAE . 



BATRACHOSPERMUM Roth. 



B. moniliforme Roth. 



Frequent in fresh water throughout the island. 



NEMALION Duby. 

 N. multifidum Ag. 



Not infrequent throughout. 



CHAETANGI ACE AE . 

 SCINAIA Bivona. 

 S. furcellata Bivona. 



Kings: College Point, Pike. Suffolk: Greenport, Pike. 



GELIDIACEAE. 

 GELIDIUM Lam. 



G. crinale (Turn.) J. Ag. 

 Common throughout. 



GIGARTINACEAE. 

 CHONDRUS Stack. 



C. crispus (L. ) Stack. 

 Common throughout. 



GIGARTINA Lam. 



G. mamillosa (Good. & Woodw. ) J. Ag. 

 Suffolk: Greenport, Montauk, Pike. 



PHYLLOPHORA Grev. 

 P. Brodiaei (Turn.) J. Ag. 



Pike's specimens from Glen Cove and Orient seem to be P. 

 tnembranifolia. 



P. membranifolia (Good. & Wood.) Ag. 

 Not infrequent throughout. 



GYMNOGONGRUS Mart. 

 G. Torreyi (Ag.) J. Ag. 



New York Bay, Agardh ; Fort Hamilton, J. Hooper. 



AHNFELDTIAFr. 

 A. plicata (Huds. ) Fr. 

 Frequent throughout. 



RHODOPHYLLIDACEAE. 



CYSTOCLONIUM Kutz. 



C. purpurascens (Huds.) Kiitz. 

 Common throughout. 



