veterinary obstetrics including the diseases of breeding animals and of the new born fig 59 rabbit embryo of the ninth lay seen from the donsalside after kolliker xi stz stem zone pz parietal zone in the stem zone s pairs ofsomites appear on either side of the chorda dorsahs and nenraltube ap area pellucida rf medullary groove vh fore bram ab eye vesicle mh mid brain hb hind brain uw primitive segment h heart ph pericardial portion of body cavity vd margin of entrance to foregut af amniotic fold vena omphalo mesentenca heisler 342 veterhiary obstetri 2awcta9.jpg from thé ware zone View Photo