Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 6. (Budapest, 1973)

the species belonging to the genus Syphacia were not concurrent, the material was left unidentified and will be the subject of another study. Evaluation of our Material 1. Taxonomic structure This structure is characterized by the presence of helminths belonging to three classes, namely Trematoda, Cestoda and Hematoda

. As to species representation of helminths, a certain balance between cestodes and nematodes was observed, since there were 10 species of cestodes and 6 species of nematodes in our material. The trematodes were represented by 1 species only(Tables 1-2). 2. Biological structure This structure was characterized by the presence of biohelminths

, geohelminths

, pseudogeohelminths and ageohelminths

. The biohelminths comprised 1 species of trematodes (

Notocotylus noyeri - intermediate hosts are Mollusca) and all species of cestods whose host is M. arvalis. Among them were also the species whose intermediate hosts were not exactly known: Aprostatandrya macrocephala

, Paranoplocephala brevis

, Skrj

abinotaenia lobata

. The intermediate host of the species Hymenolepis asymmetrica

x

^ is the mites Archipteria coleoptrata. The cestods Hymenolepis diminuta and H. fraterna should be assigned to facultative biohelminths, because they develop with the help of intermediate hosts - arthropods, but also without intermediate hosts. The typical geohelminths are the nematodes Heligmosomoides poly- gyrus

, H. skrjabini and Heligmosomum costellatum

. To the group PROKOPIC (1962) records that the intermediate host of Hyme nolepis straminea is the mite Archipteria coleoptrata. According to BAER et TEHORA (1970), the figures and measurement of the specimens examined by PROKOPIC (1962) show that the species Hymenolepis asymmetrica was studied. -^-.^