Dr. Murai Éva szerk.: Parasitologia Hungarica 11. (Budapest, 1978)

ready published and those of Heligmosomoides polygyrus polygyrus (Dujardin, 1845), Tricho strongylus retortaeformis (Zeder, 1800) and Trichocephalus muris (Schrank, 1788) are subjects of future publications. Detailed faunistical data are in Table 1, localities are seen on the map (Fig. 1) DESCRIPTIONS 1. Heligmosomum mixtum Schulz, 1954 (Fig. 2A-D) For distribution in Hungary see Table 1 and map. - Localization: small intestine. Extensity 11.5%, intensity 1-14 specimens. Synlophe: Dorsal surface of body with transversal, ventral surface with longitudinal cuticular crests (crête). These crests withouth chitinized frames, numbering 20-21. Crests present from just behinde vesicle to bursa copulatrix in males, to vulva in females. Fig. 2: Heligmosomum mixtum Schulz, 1954 A = Anterior end of female; B = Synlophe of female; C = Bursa copulatrix; D = Tail of female, lateral view Male: Body length 10.3-13.4 mm, maximum width 0. 21-0. 26 mm. Esophagus length 0. 50-0. 60 mm. Nerve ring 0. 23-0. 27 mm, excretory pore and deirids 0. 44-0. 49 mm from the anterior end. Bursa copulatrix symmetrical. Dorsal ray short, branching into four, the two inner limbs longer than the outer ones. Externo-dorsal rays slender and long. Lateral rays with a common trunk. Medio-lateral rays the longest, while antero-lateral ones the thickest. Ventral rays also from a common trunk. Latero-ventral rays the most developed.