MICROSCOPICAL OBSERVATIONS. 



11 



BRYAN CO., GA. — co?itinued. 



RICE FIELD MUDS. 



The mud from the rice fields on the Ogeechee was collected at the embank- 

 ments by the side of the canals and ditches on the following estates, viz : 



Cherry Hill, belonging to R. J. Arnold, Esq. 



Strother Hall, " Col. McAllister. 



A new plantation, " Judge Langdon Cheves. 



These muds all agreed in character with those examined near Savannah, and 

 furnished the following species, viz : 



Actinoptychus denarius, Ehr. 



" senarius, Ehr. 



Coscinodiscus excentricus, Ehr. 



" subtilis, Ehr. 



Dictyocha fibula, Ehr. 

 Gallionella sulcata, Ehr. 

 Pinnularia interrupta. Kg. 



" viridis, Ehr. 

 Rhaphoneis rhombus, Ehr. 



Surirella splendida, Ehr. 

 Terpsinoe musica, Ehr. 

 Triceratium favus, Ehr. 



" alternans, B. 



" reticulum, Ehr. 



Zygoceros rhombus, Ehr. 



Pollen pini. 

 Phytolitharia, &c. 



BRYAN CO., GA. — Continued. 



WHITE HALL, THE RESIDENCE OF R. J. ARNOLD, ESQ. 



In a ditch of an old rice field, and at some distance from the river, the follow- 

 ing species were found among the leaves of Utricularia verticillata, viz : 



Bacillaria paradoxa, Ehr. 

 Gallionella aurichalcea, Ehr. 

 Himantidium arcus, Ehr. 

 Synedra spectabilis, Ehr. 

 " vitrea, Ehr. 



Closterium acerosum, Schr. 



Arcella dentata, Ehr. 

 Vagjnicola crystallina, Ehr. 



DITCH NEAR THE CHURCH IN THE VICINITY OF WHITE HALL. 



This furnished the following : 



Ankistrodesmus falcatus, Corda. 

 Aptogonum desmidium, Ehi\ 

 Arthrodesmus convergens, Ehr. 



" incus, Breb. 



Didymoprium Borreri, Ralfs. 

 Docidium verrucosum, B. 

 Euastrum affine, Ralfs. 



Desmidie^. 



Micrasterias orenata, Breb. 

 Pediastrum heptactis, Menegh. 

 Penium digitus, Breb. 

 Scenedesmus obliquus. Kg. 

 Staurastrum dejectum, Breb. 



" gracile, Ralfs. 



Xanthidium aculeatum, Ehr. 



