SYMMETRY IN TRANSPLANTED LIMBS 59 
limb which takes place in most cases (table 2). It is more 
readily understood in the two cases in which a single limb of 
opposite asymmetry is present. 
In the first of these, ^^ in which a limb bud from the same side 
of the body was implanted in inverted position (p. 32, figs. 39 
to 41), there are two entirely distinct shoulder-girdles. The 
anterior one has no connection with the other and is undoubtedly 
derived from the host, having the characteristics of girdles which 
develop after extirpation of the limb bud. The scapula and su- 
prascapula are already joined in cartilaginous union with the 
procoracoid, but the coracoid is connected with the latter by 
ligament only. The girdle belonging to the transplanted limb is 
mainly posterior to the other, though there is some overlapping. 
It is large to have developed from a transplanted bud, but it 
has the characteristics of such. There is a distinct procoracoid 
process as well as a large coracoid, both of which project pos- 
teriorly from the glenoid cavity. This girdle is clearly reversed, 
as is the transplanted limb which is connected with it. 
The other single disharmonic limb is the one developed from a 
bud taken from the opposite side of the body.^- The limb itself 
is atrophic (fig. 64) . The girdle is double, but the ventral parts 
of the two members are fused. The suprascapula, which is single 
and belongs to the host, is not connected with the rest. The 
Figs. 96 to 99 Orthotopic transplantation; right limb to left side (het.dv.). 
Exp. R. E. 107. 
Fig. 96 Dorsal view, eight days after operation. Transplanted bud (TR) 
smaller than normal (A'^) and more pointed. 
Fig. 97 Dorsal view, thirteen days after operation. 
Fig. 98 Lateral view, thirteen days after operation. 
Fig. 99 Dorsal view, nineteen days after operation. 
Fig. 99A Lateral view of transplanted limb. 1 to 3, numbers of digits. 
Figs. 100 to 102 Orthotopic transplantation; right limb bud to left side 
(het.dv.). Exp. R. E. 116. Transplanted limb (TR) becomes a normal left. X 10. 
Fig. 100 Dorsal view, seven days after operation. Transplanted bud only 
slightly smaller than normal. 
Fig. 101 Dorsal view, thirteen daj's after operation. 
Fig. 102 Lateral view, same age. 
'U. E. 64. « R. E. 87. 
