PLANTS OF RHODE ISLAND. 



105 



COELASTRUM, Naegr. 

 raicrosporum, Naegr. Common. 



SORASTRUM, Kg. 

 spinulosum, Kg. Common. 



SCENEDESMUS, Meyen. 

 caudatus, Corda, var. typicus, Kirch. Everywhere. 



8. quadricauda, Breb. Alg. Rhod. No. 166. 

 dimorphus, Kg. Not uncommon, 



acutus, jNIeyen. Quite common, 



obtusus, Meyen. Quite common. No. 167. 



rotundatus, Wood. Providence. 



Naegr. 



Very common. 

 Brook at Davisville. 



OPHIOCYTIUM 

 cochleare, A. Br. 

 capitatum, Wolle. 

 parvulum, (Berty,) A. Br. 

 circinatum, Wolle. 

 CUSpidatum, (Bailey,) Rab. 



Closterinm, — , Bailey. Alg. Rhod 



CHARACIUM, A. Br. 

 ambiguum, Herm. 

 Naegelii, A. Br. 

 heteromorphum, Reinsch. 



PROTOCOCCUS, Ag. 

 viridis, Ag. 



var. angulosa, (Menegh.) 

 var. dissectus, (Naegr.) 

 var. miniatus, (Naegr.) 

 var. infusionum, (Rab.) 

 var. botryoides, (Rab.) 

 var. gigas, (Kg.) 

 var. "Wimmeri, (Rab.) 

 var. vestitus, (Reinsch.) 



Quite common. 

 Not common. 

 No. 161. 



Spectacle Pond. 



Not uncommon. 



Pocasset. 



Everywhere. 



Common. 



Common. 



Common. 



Common. 



R. W. Park. 



Quidnessett, &c. 



Spectacle Pond. 



Pocasset, &c. 



POLYEDRIUM, Naegr. 

 trigonum, Naegr., var. bifurcatum, Wille. Davisville. 



gigas, Wittr. Pocasset Pond, 



minimum, A. Br. Spectacle Pond, &c. 



longispinumi, (Pertz.) Rab. Quidnessett. 



PalmeUacece. 

 DICTYOSPH^RIUM, Naegr. 

 reniform.e, Bulnh. " Ponds now and then," rarely plentiful. 



