Abstract
1. Reciprocal transplants of dorsal ectodermis between adult hairless mice and their normal litter mates were investigated in two hairless mutants, rhino and furless.
2. Of a total of 56 grafts in which all eight combinations survived the operation (Table 1), 40 cases were completely successful.
3. Successful grafts of non-rhino skin to rhino host behaved autonomously and also rhino grafts on non-rhino hosts behaved autonomously except for a temporary hair growth on the outer border of the graft observed about three weeks after the operation.
4. Furless skins grafted on non-furless hosts were depilated once immediately after operation and regrew after a month, but the second depilation occurred irrespective of the donor's periodicity. The non-furless skin on furless host was not affected by the host, on the contrary the body hair of furless host behind the graft remained unchanged, while the area in front of the graft was depilated in regular fashon.
