110 PLANTS OF RHODE ISLAND. 



3. connatus, (Bi-eb.) Kirch. Providence. 



Cosmarivm, — , Breb. Alg. Rhod. No. 139. 



4, pseudo-connatus, Xord. Quidnessett. 



COSMARIUM, Corda. 



ovale, Ralfs. Common. 

 Cucumis, Corda. Providence, Mr. Lathrop ; Quidnessett. 



constrictum, Delp. Providence. 



Scenedesmus, Delp. Common, 



quadratum, Ralfs. Davisville, &c. 



granatum, Breb. Spectacle Pond, &c. 



moniliforme, Ralfs. Xeutakonkanut. 



globosum, Bulub. Spectacle Pond, &c. 



bioculatum, Breb. Common. No. 134. 



tinctum, Ralfs. Davisville, &c. 



nitidulum, DeNot. Quidnessett, &c. 

 contractum, Kirch. Providence, Mr. Lathrop ; Quidnessett. 



sexangulare, Lund. Neutakonkanut. 



depressum, (Naegr.) Lund. Same locality. 

 Meneghini, Breb. Quidnessett, Providence, &c. No. 135. 

 polygonum, Naegr. Common, but not plentiful, 



notabile, Breb. Quidnessett. 



undulatum, Corda. Quidnessett, »fec. 



var. crenulatum. Spectacle Pond, &c. 



crenatum, Ralfs. Providence. No. 136. 



Naegelianum, Breb. Providence, 



venustum, Rab. Spectacle Pond, &c. 



pyramidatum, Breb. Quidnessett, c%c. 



pseudo-pyramidatum, Lund. Common. 



Ralfsii, Breb. Geneva Pond, 



galeritum, Nord. Providence, Mr. Lathrop. 



triplicatum, Wolle. Davisville. 



margaritiferum, Menegh. Common. 



Botrytis, ^lenegh. Common. 



Brebissonii, Menegh. Quidnessett, &c. 



conspersum, Ralfs. Auburn, 



tetraophthalmum, (Kg.) Breb. Quidnessett, &c. 



intermedium, Delp. Specracle Pond, &c. 



microsphinctum, Nord. Neutakonkanut, &c. 



sphalerostichum, Nord. Same locality. 



Portianum, Archer. Very common, 



orbiculatum, Ralfs. . Spectacle Pond, &c. 

 excavatum, Nord. Providence, Mr. Lathrop ; Quidnessett. 



* There being no drawing, description or specimen extant, it cannot be deter- 

 mined what is, "C. grandituberculatum, Olney, n. sp.," Aig. Rhod., No. 141. 



