الفهرس 
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Abstract
The present study has revealed the presence of seven species of helminth parasites in the alimentary tract of the cat fish Clarias lazera inhabiting Manzala lake in the northern part of Egypt. These parasites are :Astiotrema reniferum(loose, 1898)STOSSICH, 1904,Orientocreadinm batrachoides Tubangui, 1931, Eumazenia bangweulensis Beverley-Burton, 1962, E. aegyptiacus Mohammed, 1978, polyonchoboth-rium clarias.