— 175 — 



\ a viru la dactylus Ktz. 



Navicula dactylus var. mixor Ost. 



Navicula Dariana A. Sch. var.? 



Navicula debilitata M. Per. 



Navicula Deblockh M. Per. 



Navicula Delpiroui M. Per. 



Navicula dicephala Eh. 



Navicula dicephala var. miuor. 



Navicula digitoradiata Greg. 



Navicula distinguenda Cleve. 



Navicula divergeas W. Sm. 



Navicula divergentissima Grun. 



Navicula dubia Eh. 



Navicula elliptica Ktz. (Diploneis elliptica). 



Navicula exigua Greg. 



Navicula fasciata Lag. 



Navicula fasciata var. gigantea M. Per. 



Navicula fasciata var. inconstantissiina. 



Navicula fasciata var. marcata Ost. 



Navicula fasciata var. thermalis. 



Navicula firma Ktz. 



Navicula Flotowii Grun. 



Navicula fonticola Grun. 



Navicula fontinalis Grun. 



Navicula Gasilidei M. Per. 



Navicula Gasilidei var. major M. Per. 



Navicula Gasilidei var. minor M. Per. 



Navicula gastrum Eh. 



Navicula gastrum var. major. 



Navicula gentil is Donkin. 



Navicula gibba Ktz. 



Navicula gigas Ktz. 



Navicula gomphonemacea Ost. 



Navicula gracilis Eh. 



Navicula gracilis var. neglecta Y. H. 



Navicula gracillima Ralfs. 



Navicula gracillima var. stauroneif orrais. 



Navicula gregaria Donkin. 



Navicula balophila Grun. 



Navicula halophila f a minor. 



Navicula halopbila var. arvernense R. d'Aub. 



