Fig. 4. Cartilage pattern of additional limbs derived from grafted presumptive limb regions. (A) A specimen of a wing graft (arrow) on the leg-level median region has a wing-type skeletal pattern that includes wing digits 2, 3 and 4. (B) A specimen of a leg graft (arrow) at the wing level has a wing-type pattern that includes wing digits 3 and 4. Compare them with leg digits (indicated by I, II, III, IV in A). (C,D) Specimens of a leg graft at the wing level have defective patterns that include leg-like digits. We classified these incomplete types of skeletal patterns (C,D) as unidentified in Table 2.
