106 PLANTS OF RHODE ISLAND. 



PALMODACTYLON, Naegr. 

 Varium, Naegr. Appears frequently. 



TETRASPORA, Ag. 

 lubrica, (Roth.) Ag. Providence. No. 77. 



var. lacunosa, (Cliaud.) Providence, &c. 



T. lacunos((, Chanv. Alg. Rhod. No. 76. 



PALMELLA, Lyngb. 



1. hyalina, Breb. Common. 



2. Mooreana, Harv. Common. 



3. uvseformis, Kg. Geneva, &c. 



PORPHYRIDIUM, Naegr. 

 cruentum, Naegr. Very common. 



GLOEOCYSTIS, Naegr. 

 arapla, Kg. Quidnessett, &c. 



NEPHROCYTIUM, Naegr. 



1. AgaradhianurQ, Naegr. Common. 



2. Nsegelii, A. Br. Woonasquatucket, &c. 



RHAPHIDIUM, Kg. 



polymorphum, Fres, var. aciculare, A. Br. Common. 



var. sigmoideum, Rab. Common. 



var. falcatum, (Corda,) Rab. Common. 



var. contortum, (Thur.) Wolle. Common. 



DIMORPHOCOCCUS, A.Br, 

 cordatus, Wolle. Common. 



EREMOSPHyERIA, D. By. 

 viridis, D. By. Stepping Stones, Cat Swamp. 



Chytridlece. 

 CHYTRIDIUM, A. Br. 



1. minus, La Cost & Suring. Common but not plentiful, 



2. globosum, A. Br. Roger Williams Park. 



OLPIDIUM, A. Br. 

 ampullaceum, A. Br. Pocasset. 



Conjiigatce. 

 SPIROGYRA, Lk. 



1. tenuissima, (Ilass.) Kg. Providence, Mr. Lathrop. 



2. quadrata, (Hass.) Petit. Spectacle Pond, Providence, 3Ir. 



Lathrop. 



3. calospora, Cleve. Providence. 



