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

Material and Methods Investigations were made on Cyprinus carpio and Ctenopharyngodon idellus infected with B. gowkongensis and originating from different fish-ponds and on Phoxinus phoxinus infected with B_. phoxini from the Lake Malom at Tapolca (Western Hungary, Comitat Veszprém). Parasites collected from the gut were examined partly in alive or fixed state. Por preservation mostly hot 5 % formalin or less frequently 4 % formalin solution was used. Most of the worms were stained in whole, the rest was used for the preparation of histological sections. Whole worms were stained with lactic acid carmine, haematoxyline and hydrochloric carmine, while histological sections with haematoxyline-eosin and by the PARKAS-MALLORY method (after embedding in paraffin). Prom Phoxinus phoxinus, Cyprinus carpio and Ctenopharyngodon idellus respectively, more than 100 worm specimens were examined. The description of Bothriocephalus gowkongensis Yeh. 1955, on the basis of samples collected from Cyprinus carpio in Hungary A large-sized worm. Total length 100-320 mm (attaining 100 mm, also in young fishes, older specimens may exceed 300 mm), maximum width of strobila 2-2.5 mm. Scolex laterally rather flat, that is why invariably in a lateral position on slides, looking characteristically oordiform (Pig. l). In a dorsoventral position scolex elongated, elliptic, terminally with a small apex (Pig. 2). In fixed samples, apical disk only slightly expressed. In living worms apical disk better observable, formed by a widening, strong, orbicular muscle in first quarter of scolex. Length of scolex 550-1100 /u, width 400-1000/u, thickness 250-400 /u. Diameter of bothridia 240-500 AI, depth 180-320yu. Bothridia dorsoventral.