CONTENTS // Conrad R., Kubát ?.: // Bemerkungen zu Pocadius ferrugineus und P. adustus (Coleoptern, Nitidulidae)...5 // Hajer J., Polívková M., Reháková M: // Egg sac building procedure for spiders of the species // Pholcus phalangioides (Fuesslin) (Araneae, Pholcidae)... 11 // Ružicka V., Antuš R: // Spiders in stony debris in central Bohemia...19 // ípser J.: // Clastogenic effects of ethylmethanesulfonate (EMS) // and propylmethanesulfonate (PMS) in root tip cells of // Crepis capillaris...31 // Ipser J.: // Clastogenic effects of some purine bases analogues // in Chinese hamster cell line V-79...43 // Roušar A.: // Sekác Nelima semproni (Szalay, 1951) - nový druh pro faunu Ceské republiky. First record of // Nelima semproni (Szalay, 1951) from Czech Republic...53