104 



(Stauroneis.) 



acuta, Smith. 



salina, Smith. 



anceps, Ehr. 



linearis, Ehr. 



acuta, Smith. 



amphicephala, Kutz. 

 Pleurosigma obscurum, Smith. 



attenuatum, Smith. 



lacustre, Smith. 



Spencerii, Smith. 



Fasciola, Smith. 



macrum, Smith. 

 Synedra lunaris, Ehr. 



biceps, Smith. 



pulchella, Kutz. 



gracilis, Kutz. 



acicularis, Smith. 



radians, Smith. 



Ulna, Ehr. 

 Cocconema lanceolatum, Ehr. 



Cistula, Ehr. 

 Doryphora Amphiceros, Kutz. 



Boeckii, Smith. 

 Gomphonema geminatutn, Ag. 



constrictum, Ehr. 



acuminatum, Ehr. 



cristatum, Ral/s. 



dichotomum, Kutz. 



capitatum, Ehr. 



intricatum, Kutz. 

 ■ Meridion circulare, Ag. 



constrictum, Ralfs. 

 Bacillaria paradoxa, Gmel. 

 Hemantiditjm pectinale, Kutz. 



bidens, Ehr. 



g'racile, Enr. 



majus, Smith. 

 Odontidium mutabile, Smith. 



Tabellaria, Smith. 



