Dr. Holló Ferenc szerk.: Parasitologia Hungarica 4. (Budapest, 1971)

Ordo: Proteocephalidea Mola Pamilia: Proteocephalidae La Rue Species: Proteocephalus macrocephalus (Creplin, 1825) (Pigs. 3-4) Host: Anguilla anguilla L. Site of infection: Intestinal tract Locality and date of collection: Balatonfüred Bay, Lake Balaton, 25 July, 1968, leg. É. MURAI Intensity: 30-80 specimens Extensity of infection: 14 % (2 of 14 eel specimens) Fig. 3 Proteocephalus macrocephalus: hermaphrodite segment Description: A medium-sized proteocephalid. Length of strobilae 150-200 mm, maximum width 1.8 mm. Scolex rounded, 0.250-0.400 mm long, 0.270-0.4-50 mm wide. Apical sucker rudimentary, hardly observable, 0.030 mm in diameter. External diameter of the four normal suckers 0.100-0.125 mm, aperture of sucker cavity 0.0750.090 mm. Surface of scolex without spines or hooks. Neck region flatted, dorso-ventrally

, 0.150-0,180 mm wide. Ratio of length to width of proglottids varies according to state of contraction and maturity of segments. Young segments