26 



MICROSCOPICAL OBSERVATIONS. 



MACON, GA. 



May 6th, 1850 — In a mill-pond on the j-oad to Brown's Mount, near Macon, 

 Ga,, I found the following species, viz : 



Desmidie.4;. 

 Aithrodesmus convergens, Ehr. 

 Closterium rooniliferum, Ehr. 

 Cosmarium margaritiferum, Menegh. 



" ovale, Ral'fe. 



" pyramidatuni, Breb. 



Desmidium quudrangulatum, Ralfs. 

 Didymocladon fiu'cigerus, Elir. 

 EHastruie elegans, Breb. 



" rostratum, Ralfs. 



" sublobatum, Breb. 



" verrucosum, Ehr. 

 Miwasterias denticulata, Breb. 



" fm-cata, Ag. 



" truncata, Breb. 



Pediastrum boryanum, Menegh. 



" heptaetis, Menegh. 



" ellipticum, HassalL 



DeSMIDIE.<J5. 



Pediastrum tetras, Ralfs 

 Penium digitus, Breb. 

 *8phcerozosma serratum, B. 

 Staurastrum cyrtocerum, Breb. 

 " gracile, Ralfs. 



Infusoria, etc. 

 Arcella dentata, Ehr. 

 Dinobryon sertularia, Ebr. 

 Euglena pleuronectes, Elu". 

 Pterodina patina, Ehr. 

 Hotifer vulgaris, Schr. 



Alg^. 

 *Aporea ambigua, B. 

 Bulboch«te setigera, Ag. 



ATHENS, GA, 



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



Desmidie.e. 

 ClosteriHin lunula, Ehr. 



" moniliforme, Elir. 



" turgidism, Ehr, 



Desmidium Swartzii, Ag. 

 Didymocladon furcigerus, Ralfs. 

 Docidium clavatum, Kiitz. 

 Euastrum oblong-um, Balfs. 



" verrucosum, Ehr. 

 Micrasterias papilJifera, Breb. 



" pinnatifida, Ehr. 



Penium digitus, Ehr. 

 Staurastrum orbiculare, Ehr. 



DsSMimEyE. 



Staurastrum muticum, Breb. 

 Spirotsenia condensata, Breb. 



Infusoria, etc. 

 Amceba prineeps. 

 Arcella angulata. 

 Cocconema c3rmbiforme. 

 Difflugia proteiformis. 

 * " spiralis, B. 



Pinnularia viridis, Ehr, 



