16 EEPORT ON EECBNT COIXECTIONS 



Navicula elUptica Kuetz. 



Holt county, Johnson, Long Pine; fossil, Mullen. 

 (12173) 

 Navicula gigas ( Ehr. ) Kuetz. 



Fossil, Mullen. (12174) 

 Navicula hungarica Grun. 



Fossil, Mullen. (12175) 

 Navicula legumen Ehr. 



Brock, Auburn ; fossil, Mullen. (12176) 

 Namcula menisculus Schum. 



Long Pine. (12177) 

 Navicula minuscula Grun. 



Nebraska City, Peru. (12178) 

 Navicula mormonorum De Toni. 



Auburn. (12179) 

 Navicula noiilis (Ehr.) Kuetz. 



Fossil, Mullen. (12180) 

 Navicula reinhardtii Grun. 



Long Pine, Fairbury. (12181) 

 Navicula rhynclwcephala Kuetz. 



Fairbury. (12182) 

 Nitzschia balatonis Grun. 



Lincoln. (12183) 

 Nitsschia dissipata (Kuetz.) Grun. 



Long Pine. (12184) 

 Nitzschia obtusa W. Sm. 



Fossil, Mullen. (12185) 

 Nitzschia sinuata (W. Sm.) Grun. 



Fossil, Mullen. (12186) 

 Nitzschia spectdbilis (Ehr.) Balfs. 



Holt county; fossil, Mullen. (12187) 

 Pleurosigma eciotoense SuUiv. 



Crete. (12188) 

 Rhoioosphenia curvata (Kuetz.) Grufl. 



Brock. (12189) 



