Tapeworm of sheep, mature proglottid with eggs t.s. – Honey bee ovaries of queen t.s. – Fish, testis with spermatozoa t.s. – Sperm smear of bull – Testis of bull, spermatognesis t.s. – Ovary of rabbit, ovogenesis t.s. – Fallopian tube of guinea pig t.s. – Uterus of pig, resting stage t.s. – Uterus of rat with embryo t.s. – Placenta of cat or pig t.s.