Skeletons of control (A) and vehicle control (B), and selected sections from different dose groups (11,22,44µg/g B.W) (C-E). Simple arrows show less degree ossification while bold arrows show no ossification in three different dose groups. F, Frontal; N, Nasal; Pm, Pre Maxila; Z, Zygomatic; Md, Mandible; C, Clavicle; H, Humerus; R, Radius; U, Ulna; Ri, Ribs; Ti, Tibia; Fi, Fibula; I, Ilium; Fe, Femur; Sq, Squamosal; A, Atlas; Eo, Exocipital; So, Supraocipiltal; Ip, Interperitonial; P, Parietal.