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ilMH 



Fig. 3i Dactylogyrus auriculatus (Nordmann), adult worms in various 

 stages of contraction, f-rom gills of Abramis brama (L. ) from the Delta 

 of the Volga. 



Fig. 4. Tristoma coccineum Cuvier, adult worm from the gills of Xiphias 

 sp. from the region of the Maderia Islands (Atlantic Ocean). 



