Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 7. (Budapest, 1974)

anterior to cloaca.This structure was unknown and not described in this species (see GVOZDEV et al. 1970). Females. Length 9.00-10.80 mm, maximum width 530-600 p. Lateral alae constricted at level of middle portion of esophagus, then decurrent to posterior end of body. Esophagus length 720-780 p.. Nerve ring 190-210 ja and vulva 4.30-4.40 mm from anterior end of body. Tail pointed, length 1.60 mm (Pig. 1 P). Eggs 96-106 x 49-60 p. (Pig. 1 G) . 2 . Dermatoxys schumakovit

sc hi (Schulz, 1948) (5 <?o 6 99) Host: Ochotona dauurica dauurica Localization: intestine. Description: Mouth-opening surrounded by three lips, each with two triangular projections, latter sometimes almost indiscernible (Pig. 2A). Mouth-opening surrounded by two well developed lateral amphids and four submedial papillae. Paired subventral and subdorsal alae originating on both sides from base of buccal cavity, gradually reaching each other and then formig lateral alae (Pigs. 2B, C). Males: Body length 5.40-6.70 mm, maximum width 390 p. Depth of buccal cavity 40 p. Esophagus length 500-600 p.,Nerve ring 140180 /u from anterior end. Tail length 580-670 p. No spicule and no gubernaculum. A 1.30-1.60 mm long structure of cuticular cristae, ending at a distance of 310-340 p. from cloaca (Pig. 2D). Cloacal opening surrounded by one unpaired single and seven paired papillae, two pairs in preanal

, one pair in anal, rest in postanal position (Pig. 2E). Females: Body length 8.90-10.80 mm, maximum width 600 p. Depth of buccal cavity 43-54 ,u. Esophagus length 660-840 p. Nerve ring 210-220 /u, vulva 3.10-4.40 mm from anterior end. Tail length 1.46-1.60 mm. Eggs: 108-112 x 52 p. 154