SYMMETRY IN TRANSPLANTED LIMBS 65 
the difference from normal size persisted for twelve or more days,^^ 
gradually diminishing during that period (fig. 106). In others 
the difference was less marked, though in all some difference in 
favor of the limb on the operated side was noted. 
l/j.. Homopleural transplantations, dorsoventral orientation. 
Four out of the five cases in this group gave rise to reduplications 
in the grafted limb. 
The reduplications vary. One®^ is a typical case of radial mir- 
roring of the lower part of the forearm and hand (fig. 107). 
Another^" is similar, except that the anterior member is itself 
reduplicated, the hand being a nearly symmetrical complex with 
four digits. These two individuals are in every respect like 
those cases of reduplication resulting from simple inverted limb 
buds, in which the primary member is reversed and is accom- 
panied by a non-reversed twin which takes up the normal posi- 
tion. In two other cases^^ the reduplication is less and is of a 
character not necessarily attributable to disharmonic combina- 
tion, though there is nothing to indicate that it is not due to such 
a cause. Principally the digits are involved (fig. 108). 
In the remaining case^- a normal limb developed. This one 
and possibly also the two foregoing are analogous to those cases 
of simple transplantation in which the inverted limb bud develops 
into a normal limb without reversal by means of rotation (p. 40). 
Fig. 106 Superposed limb bud; right limb bud to right side, normal position 
(hom.dd.). Exp. S. E. 3. Normal limb (TR) on operated side. N, normal left 
limb. Preserved specimen, ventral view, eighteen days after operation. X 10. 
Fig. 107 Superposed limb bud; right limb to right side inverted (hom.dv.). 
Exp. S. E. 18. Reduplicated appendage (TR) on operated side. Preserved 
specimen, ventral view, eighteen days after operation. X 10. 
Fig. 108 Superposed limb bud; right limb bud to right side inverted (hom.dv.) 
Exp. S. E. 9. Operated limb (TR) normal except for reduplication of second 
digit. X 10. 
Fig. 109 Superposed limb bud; right limb bud to left side (het.dd.). Exp. 
S. E. 6. Reduplication with heteropleural member reduced to spur (S). X 10. 
Fig. 109A Outline of limb bud from above. Five days after operation (free- 
hand sketch). 
Fig. 109B Same, eleven days after (free-hand sketch). 
" S. E. 3. 69 s, E. 18. '» S. E. 2. ^i S. E. 9 and 14. " S. E. 10. 
