Fig. 2. Proteocephalus sagittus (Grimm, 1872) from Barbatula barbatula, Czech Republic (IPCAS C- 33 / 1). A. Scolex. B. Mature proglottid. Abbreviations (for all figures): cc = chromophilic cells; ci = cirrus; cp = pars copulatrix vaginae; cs = cirrus-sac; doc = dorsal osmoregulatory canal; du = uterine diverticles; eh = embryonic hooks; em = bilayered embryophore; ga = genital atrium; gc = glandular cells, probably of exocrine type; lm = internal longitudinal musculature; ln = longitudinal lateral nerves; Mg = Mehlis' gland; oe = outer envelope; on = oncosphere; oo = oocapt; ov = ovary; sc = subtegumental cells; sd = sperm duct (vas deferens); st = subtegumental muscle fibres; te = testes; tg = tegument; ud = uterine ducts; us = uterine stem; ut = uterus; vc = vaginal canal; vd = vitelloduct; vf = vitelline follicles; voc = ventral osmoregulatory canal; vs = vaginal sphincter.