MICROSCOPICAL OBSERVATIONS. 



MACON, GA. 



May Gth, 1850. In a mill-pond on the road to Brown's Mount, near Macon, 

 Ga., I found the following species, viz : 



DESMIUIE^E. 



Arthrodesmus convergens, Elir. 

 Closterium moniliferum, Ehr. 

 C'osmarium margaritiferum, Menegh. 

 " ovale, Ralfs. 



pyramidatum, Breb. 

 Desmidium quadfangulatnm, Ralfs.. 

 Didymocladon furcigerus, Ehr. 

 Euastrum elegans, Breb. 



rostratum, Ralfs. 

 " sublobatum, Breb. 

 " vernicosum, Ehr. 

 Micrasterias denticulata, Breb. 

 " furcata, Ag. 



truncata, Breb. 



Pediastrum boryanum, Menegh. 

 " heptactis, Menegh. 



ellipticum, llassall. 



DESMIDIE.K. 



Pediastrum tetras, Ralfs 

 Penium digitus, Breb. 

 *SpLaerozosma serratum, II. 

 Staurastrum cyrtoccrum, Br^b. 

 " gracile, Ralfs. 



INFUSORIA, ETC. 

 Arcella dentata, Ehr. 

 Dinobryon sertularia, Ehr. 

 Euglena plouronectcs, Ehv. 

 Pterodina patina, Ehr. 

 Rotifer vulgaris, Schr. 



ALG^E. 



*Aporea ambigua, B. 

 Bulbochsete setigera, Ag. 



ATHENS, GA. 



The following species were collected on the 20th of May, near Athens, Ga. 



viz : 



DESJIIDIE.E. 

 Closterium lunnla, Ehr. 



moniliforme, Ehr. 

 " turgidum, Ehr. 



Desmidium Svvartzii, Ag. 

 Didymocladon fureigerus, Ralfs. 

 Doeidium clavatum, Kiitz. 

 Euastrum oblongum, Ralfs. 

 " vernicosum, Ehr. 

 Micrasterias papillifera, Breb, 



pinnatifida, Ehr. 

 Penium digitus, Ehr. 

 Staurastrum orbiculare, Ehr. 



DESMIDIE.E. 



Stanrastrum inuticmn, Breb. 

 Spirotaenia condensata, Breb. 



INFUSORIA, ETC. 

 Amoeba priuceps. 

 Arcella angulata. 

 Cocconema cymbiforme. 

 Difflngia proteiformis. 

 * " spiralis, B. 



Pinnularia viridis, Ehr. 



