Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 8. (Budapest, 1975)

up in the median line of the body over a distance of 1-2 mm. The bulk of the vas deferens, a pyramidal structure 1200-1400 x 350-400 p in size, pushes the testes and vitellaria to one side (Fig. 3). The vagina and uterus fuse above the isthmus of ovary to form an utero-vaginal canal, which opens into the genital atrium beneath the cirrus (Fig. 6), The wall of the uterus is covered by well-developed uterine glands. The lumen of the uterus 100-180 p wide. The convolutions of the uterus extend up to the cirrus anteriorly and pass beyond the isthmus of the ovary posteriorly. The uterine coils number 9 to 11. The vagina localizes in the median line of the body and the cells surrounding its wall show a marked affinity to stain. Anterior to the isthmus of the ovary the vagina widens to form the seminal receptacle, which measures 250-450 p by 90-160 p (Fig. 7). The ovary is a Hshaped, compact structure (Figs. 7 and 8); its lateral lobes are 1, 1 to 1, 5 mm long. The isthmus of the ovary is 120-140 u wide, extending over the entire width of the medullary parenchyma. The posterior part of the lobes is narrower and longer than the anterior part. The bulky Mehlis gland, 320-400 p. in diameter, localizes behind the isthmus of the ovary (Fig. 8). The seminal receptacle fuses with ootyp and vitelloduct dorsally from the isthmus in the Mehlis gland area, where the uterus begins. The vitellaria, 95-140 p in diameter, localize along with the testes in the medullary parenchyma in the anterior four fifths of the body. Vitellaria and testes are variably present along the anterior half of the cirrus pouch (5-6 testes at both sides), but only vitellaria, 20-25 in number, can be found in the lateral field between cirrus pouch and ovary. The few postovarian vitellaria consist of about 50 vitelline follicles. The eggs are large, 56-65 by 40-44 p in size. Description of Khawia sinensis Hsü, 1935, on the basis of the present findings riost: Cyprinus carpio - Localization: anterior third of the gut - Locality: Pond farms in the catchment area of the river Tisza. Large Lytocestinae species (Fig. 2), measuring 50-80 mm in length and up to 2 mm in width. The anterior margin of the scolex is conspicuously frilled and measures 2,02,5 by 1,2-1,5 mm. A 3-4 mm long, slightly tapering "neck region" is present between scolex and the first vitellaria. The first testes are found 1,0-1,5 mm away from the latter. The vitellaria localize in the cortical parenchyma, the testes in the medullary parenchyma (Fig. 9). Vitellaria and testes are numerous filling the anterior five sixth of the body. Testes extend to the cirrus pouch. Along the sides of this structure neither testes nor vitellaria are found (Fig. 11). 3 to 5 vitellaria localize between cirrus and ovary. The postovarian groups of vitellaria are found in both cortical and medullary parenchyma (Fig. 17). The excretory canals are irregularly arranged in the cortical parenchyma, and fuse to form a terminal vesicle, 200-300 u in diameter, at the posterior end of the body. The vesicle is continuous with a terminal excretory duct, 160 u long and 40 p wide (Fig. 18). Figs. 3-8: Transversal sections of Caryophyllaeus fimbriceps (3: section at the level anteriorly to cirrus pouch; 4: section at the level of the centre of cirrus pouch; 5: section at the level of the cirrus; 6: section of the atrium genitale accepting the uterovaginal canal; 7: section at the level of the isthmus of ovary; 8: section of Mehlis'gland). Abbreviations: c = cirrus; c. p. = cirrus pouch; ex - terminal excretory duct; g a = genital atrium; Mg. = Mehlis'gland; m. 1. = long musculature; ov. = ovary; r s = receptaculum seminis; t = testes; u. = uterus; u. p. = uterovaginal pore; ut.-v. ='uterovaginal canal; vag. = vagina; v. d. = vas deferens; vit. = vitellaria.