101 



The following isolated Orders of Cryptogamia have been furnished by 

 C. Febiger, an enthusiastic Microscopist of this place, as having thus 

 far been detected in the county. 



Class Cryptogamia. 

 Sub-Class Algce. 



Natural Order DIATOMACE.E. 



Epithemia ocellata, Kutz. 



turgida, Smith. 



granulata, Kutz. 



alpestris, Smith. 



proboscidea, Kutz. 



Musculus, Kutz. 



"Wester manii, Kutz. 



rupestris, Smith. 



ventricosa, Kutz. 

 Eunotia Areas, Smith. 



triodou, Ehr. 



tetraodon, Ehr. 

 Cymbella Ehrenbergii, Kutz. 



cuspidate, Kutz. 



maculata, Kutz. 



Helvetica, Kutz. 



Scotica, Smith. 

 Amphora ovalis, Kutz. 



acutiuscula, Kutz. 

 Cocconeis Placentula, Ehr. 



scutellum, Ehr. 

 C08CINODISCD8 minor, Ehr. 



radiatus, Ehr. 

 Actinocycles undulatus, Kutz. 

 Triceratium Favus, Ehr. 



alternans, Bail. 

 Cyclotella Kutzingiana Thv;. 



Rotula, Kutz. 



