FULIGO Hall. 



F. varians Sommerf. 



Kings : Flatbush, Zabriskie. Queens : Cold Spring Harbor, 



Johnson. 



EUTHALLOPHYTA. 



EUPHYCEAE. 



CONJUGATEAE. 



DESMIDIACEAE. 

 PENIUM Breb. 



P. closteroides Ralfs. 

 Frequent. 



CLOSTERIUM Nitsch. 

 C. gracile Breb. 

 C. Lunula Ehrb. 

 C. striolatum Ehrb. 

 C. Dianae Ehrb. 

 C. Ehrenbergii Menegh. 

 C. moniliferum Ehrb. 



C. rostratum Ehrb. 



These are frequent in the ponds of the island. 



SPIROTAENIA Breb. 

 S. condensata Breb. 



Ridgewood Water Supply. 



PLEUROTAENIUM (Naeg.) Lund. 

 P. Trabecula (Ehrb.) Naeg. 

 Frequent in ponds. 

 DOCIDIUM (Breb.) Lund. 



D. crenulatum (Ehrb.) Rab. 

 Frequent. 



COSMARIUM Corda. 

 C. moniliforme Rail's. 

 C. Incus (Breb.) Hass. 

 C. Dianae Ehrb. 

 C. Botrytis Menegh. 

 C. Beckii Wille. 



These are all frequent in ponds throughout the island. 



ARTHRODESMUS Ehrb. 

 A. octocornis Ehrb. 



Ridgewood Water Supply. 



HOLACANTHUM Lund. 

 H. cristatum (Breb.) Lund. 

 Frequent. 



