12 MICROSCOPICAL OBSERVATIONS. 



DlATOMACE^E. INFUSORIA. 



Pinnularia amphigompha, Ehr. Dinobryon serUilaria, Ehr. 



Diatoma stellaris, B. Euglena longicauda, Ehr. 



Peridinium cinctum, Ehr. 



Rotifer vulgaris, Schr. 



Stentor polymorpha, Ehr. 



GLYNN COUNTY, GA. 

 IIOPETON, ON THE ALTAMAHA, RESIDENCE OF J. HAMILTON COUPER, ESQ. 



About the time when I arrived at Mr. Couper's hospitable mansion, there had 

 been several severe frosts, and some days of cold rains. Under these circum- 

 stances, the opportunities to collect the microscopic forms were much less favor- 

 able than at the preceding localities. The rice-field muds at this locality proved 

 to be quite rich in remains of diatomaceous shells, agreeing with those noticed 

 on the Savannah and Ogeechee, and furnishing abundance of the following 

 forms, viz : 



Antinocyclus, several species. Pinnularia interrupta, Kg. 

 Actinoptychus denarius, Ehr. " viridis, Ehr. 



" senarius, Ehr. Rhaphoneis rhombus, Ehr. 



*Campylodiscus argus, B. Terpsinoe musica, Ehr. 



Eupodiscus Rogersii, Ehr. Triceratium favus, Ehr. 

 * " radiatus, B. " reticulum, Ehr. 



Gallionella sulcata, Ehr. Zygoceros rhombus, Ehr. 

 Pinnularia amphyoxys, Ehr. 



In a rice-field ditch, remote from the river, I found the following species in a 

 living state, viz : 



DeSMIDIE^. DiATOMACEyE. 



Closterium lanceolatum, Kg. Surirella splendida, Ehr. 



Desmidium Swartzii, Ag. Synedra vitrea. Kg. 

 Micrasterias crenata, Breb. — 



Scenedesmus obliquus, Kg. Infusoria. 



— Gonium pectorale, Ehr. 



Diatomaceye. Hydatina senta, Ehr. 



Cocconema cymbiforme, Ehr. Lacinularia socialis, Ehr. 



Eunotia gibba, Ehr. Synura uvella, Ehr. 



" librile, Ehr. Vaginicola crystalhna, Ehr. 



" amphj'oxys, Ehr. — 



Fragillaria peotinalis, Ehr., in large masses. Alg^, &c. 



Gallionella aurichalcea, Ehr. *Aporea ambigua, B. 



Gomphonema constrictum, Ehr. Coleoohcete scutata, Breb. 



Navicula hippocampus, Ehr. Mougeotia genuflexa, Ag. 

 Naunema, undet., frustules slender. 



