Io8 YORKSHIRE NATURALISTS' UNION. 



Synedra splendens Kg. Markington. J. S. Tute. 



Roundhay and South Milford. Abbott, Emsley and Turner. 



Baildon. W. West. 

 S. lanceolata Kg. Roundhay. Abbott, Emsley and Turner. 

 S. ulna Ehrb. Markington. J. S. Tute. 



Amphipleura pellucida Kg. 



Roundhay. Abbott, Emsley and Turner. 



Cocconeis pediculus ^^r*^. Markington. J. S. Tute. 



Roundhay. Abbott, Emsley and Turner. 

 C. scutellum Ehrb. 



South Milford. Abbott, Emsley and Turner. 



Achnanthidium microcephalum Kg. 



Chapel AUerton. Abbott, Emsley and Turner. 



A. flexellum Breb. Adel. x\bbott, Emsley and Turner. 



Cocconema lanceolatum Ehrb. 



Roundhay. Abbott, Emsley and Turner. 

 C. cymbiforme Ehrb. 



Roundhay. Abbott, Emsley and Turner. 



Gomphonema geminatum Ag. 



Roundhay. Abbott, Emsley and Turner. 



G. olivaceum Kg. Markington. J. S. Tute. 



Roundhay. Abbott, Emsley and Turner. 

 Sphenosira catena Ehrb. 



Roundhay. Abbott, Emsley and Turner. 



Navicula rhomboides Ehrb. 



South Milford. Abbott, Emsley and Turner. 



Gyrosigma tenuissinfium Sm. 



South Milford. Abbott, Emsley and Turner. 



G. Spencerii Sm. South Milford. Abbott, Emsley & Turner. 

 G. angulatum Sm. . 



South Milford. Abbott, Emsley and Turner. 



G. angulatum var, ^. 



South Milford. Abbott, Emsley and Turner. 



Trans. Y.N.U., 1880 (pub. 1882). Series E 



