Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 9. (Budapest, 1976)

and were 2-5 mm long. The edges of the strobila are serrate, the genital pores unilateral, and located at half length of the proglottid, slightly laterally. Young proglottids measure 35-60 x 450-550 u, the hermaphroditic proglottids 70-90 x 750-900 n, the mature proglottids 180-220 x 960-1500 u. There are two pairs of excretory ducts, 9-12 and 35-40 u in diameter, respectively. The scolex is 280-360 u in diameter and 220-350 ju in length (Fig. 16). Its most prominent feature is the markedly developed rostellum, 120-140 u in size, carrying a crown of 38-54 hooks. The shape of the hooks is characteristic: the well developed blade is protruding anteriorly beyond the guard. For this reason the length of the hooks (37-40 u) is exceeding that of the base (34-37) by 1-3 u (Figs. 9 and 17). The hooks easily became detached from the bulging rostellum at manipulation; this can account for the frequent underestimation of hook numbers. The rostellum is retractable into a rostellar sac, 160 x 120 u in size. The 4 suckers are round, 80-110 u in diameter. The slightly tapering neck region behind the scolex is 500 u long and 200-250 u wide. The testes are arranged in a line; sometimes (in certain proglottids) they number 4 instead of 3, and in such cases the supernumerary testis is located at the aporal side in a slightly oblique position (Fig. 18). The testes measure 30-45 x 50-70 u in young proFig. 9: Vampirolepis acuta: configuration of the hook crown of the specimen in the JOYEUX collection (fixed in BERLESE medium)