42 YORKSHIRE NATURALISTS' UNION. 



Cymatopleura Solea Sm. 



Goole and Roche Abbey. E. Hunter. S.W. 



C. elliptical;-.?;!;... Goole and Roche Abbey. E. Hunter. S.W. 



Surirella striatula Turp Goole. J. Harrison. S.W. 



Synedra capitata Eh?- Goole. E. Hunter. S.W. 



Tryblionella gracilis Sjn Goole. J. Harrison. S.W. 



T. acuminata Sm Goole. J. Harrison. S.W. 



T. scutellum Sm Goole. J. Harrison. S.W. 



T. minuta Roche Abbey. E. Hunter. S.W. 



Cymbella gastroidea Kg. 



Goole and Roche Abbey. E. Hunter. S.W. 



Cocconema Boeckii Roche Abbey. E. Hunter. S.W. 



C. parvum 6"///... Roche Abbey and Goole. E. Hunter. S.W. 



Gomphonema acuminatum Ehr. 



Roche Abbey and Goole. E. Hunter. S.W. 



G. capitatum Ehr Roche Abbey. E. Hunter. S.W. 



Navicula affinis Ehrenb Goole. J. Harrison. S.W. 



N. amphirhynchus. 



Goole and Roche Abbey. E. Hunter. S.W. 



N. amphisbasna Bom. 



Goole and Roche Abbey. E. Hunter. S.W, 



N. rhynchocephala Kg. 



Goole and Roche Abbey. E. Hunter. S.W. 



N. Spencerii Sm Goole. E. Hunter. S.W. 



N. attenuata Kg Goole. E. Hunter. S.W. 



N. cuspidata Kg. Roche Abbey. E. Hunter. S.W. 



N. ovalis Sm Roche Abbey. E. Hunter. S.W. 



N. latissima Greg... ... Roche Abbey. E. Hunter. S.W. 



Pleurosigma lacustre -S"///... Roche Abbey. E. Hunter. S.W, 



P. strigilis Sm... Roche Abbey and Goole. E. Hunter. S.W. 



Trans .Y.N.U., 1878. Series E 



