MICROSCOPICAL OBSERVATIONS. 7 



Near the same locality I found Botrydium argillaceum, Wall ? and Vaucheria 

 racemosa, Lyngb. 



POND BY THE SIDE OF THE RAIL-ROAD, NEAR SAVANNAH. 



Dec. 21th, 1850. The bottom of this pond was covered with beautiful, waving, 

 plume-like masses of Myriophyllum, among the leaves of which the following 

 species were found : 



An: .E. 



Bulbochsete setigera, Ag. 

 Tolvpothrix distorta, Kg. 



DESMIDIE.E. 



Ankistrodesraus falcatus, Corda. 

 Aptogonum Baileyi, Ralfs. 

 Closterium setaceum, Ehr. 

 Cosmarium Broomeii, Thwaites. 

 cucumis, Corda. 

 pyramidatum, Breb. 

 Desmidium Swartzii, Ag. 

 Didymopriuni Grevillii, Ralfs. 

 Docidium baculum, Breb. 

 verrucosum, B. 

 constrictum, B. 

 Euastrum crassum, Breb. 



DESMIDIE.E. 



Kuastrum didelta, Ralfs. 

 elegans, Breb. 

 muricatum, B. 

 rostratum, Ralf*. 

 Micrasterias Americana, Ralfs. 



rotata, Ralfs. 

 Peniura digitus, Breb. 

 *Triploceras verticillatum, B. 



gracile, B. 



Sphserozosma excavatum, Ralfs. 

 * serratum, B. 



Xanthidium cristatum, Ehr. 



INFUSORIA. 



Arcella vulgaris, Ehr. 

 Peridinium cinctum, Ehr. 



DITCHES NEAR THE CANAL OF SAVANNAH. 



On the road to the steam saw-mill, above Savannah and near the canal, the 

 following species were seen in ditches, viz : 



DlATOMACEJE. 



Naunema, sp. undetermined, with long slender 



frustules. 

 with lanceolate 

 frustules. 



Navicula amphirbynchus, Ehr. 



Synedra vitrea, Kg. 



INFUSORIA. 

 Arcella vulgaris, Ehr. 

 Eglena viridis, Ehr. 

 Rotifer vulgaris, Schrank. 

 Synura uvella, Ehr. 



Chaetophora pisiformis, Ag. 

 Nostoc, sp. undetermined. 

 Spirillum, sp. do. moving actively. 

 Spirogyra decimina, Kg. 



DESMIDIE.*. 

 Closterium acerosum, Schrank. 



DlATOMACE^E. 



Bacillaria paradoxa, Ehr., abundant and active. 

 Gallionella aurichalcea, Ehr. 



