Dr. Murai Éva szerk.: Parasitologia Hungarica 23. (Budapest, 1990)

Table 1 Quantitative characteristics of acanthocephalan invasion of hosts Hosts Acanthocephalans Prevalence (in number) Intensity (in number) I Ci coniif

ormes 1 Egretta alba Southwellina hispida 1/1 10 (2m,8f) II Anseriformes 2 3 4 5 Anas platyrhynchos Aythya fuligula Somateria mollissima Bucephala clangula Filicollis anatis Polymorphus diploinf

latus Polymorphus magnus Polymorphus cf. phippsi Filicollis anatis 4/16 1/16 1/6 1/1 1/3 2(f);2(lm,lf) ; 2(m);l(f) 5(f) 2(f) 2(lm,If

) l(m) III Gruif

ormes 6 IV Fulica atra Charadriif

ormes Filicollis anatis 6/30 2(f);l(m)

; 2(lm,lf);4(f) ; 3(f);i(f) 7 Vanellus vanellus Sphaerirostris lancea 2/22 3(f);3(f) Remarks: m=male; f=female The specimens were studied in an with "Amplival" microscope. The drawings were made with a drawing tube. The measurements in the text are given in millimeters and those in Tables 4, 6, 7 and 9 in /xm. The species are arranged according to AMIN (1985). The species are deposited in the parasite collection of the Hungarian Natural History Museum. They all bear host collection numbers. RESULTS AND DISCUSSION Family CENTRORHYNCHIDAE Sphaerirostris lancea (Westrumb, 1821) Specimens studied: No. 398, 3 females from small intestines of Vanellus vanellus, Hortobágy, April 1964; No. 661, 3 females from Vanellus vanellus, Kiskunság, Szabadszállás, April 1966.