SYMMETRY IN TRANSPLANTED LIMBS 129 
June 11. Liml) mobile, in normal posture. Brachium shorter than 
normal. Third digit distinct, fourth indicated. 
June 21. Four digits all plain. Upper arm still short (fig. 95 TR). 
Experiment R. E. 107. May 10, 1916. Right limb bud to left side, 
dorsoventral orientation. Pronephros out. 
May 1 1 . Rather large area of yolk, posterior to graft , still uncovered. 
May 15. Transplanted bud points a little more dorsalh' and more 
sharply to side than normal. 
j\Iay 19. Grafted limb {TR) about size of normal, though more 
pointed and projecting more dorsally and laterallj^ (fig. 96, drawn 
May 18) ; divided at end (digits or reduplication?) . 
May 24. Limb on side of operation still projects a little to side. 
Normal limb seems to move and transplanted one still stiff (figs. 97 and 
98, drawn :May 23). 
Ma3' 28. Motility of operated limb still seems deficient. Third 
digit distinct (fig. 99, drawn May 29). 
June 2. Motilit}" better. Specimen preserved. 
Experiment R. E. 116. May 16, 1916. Right limb bud to left side, 
dorsoventral orientation; pronephros removed. 
Maj' 17. Perfectly healed. 
Ma3^ 20. Transplanted bud rather small, points slightly dorso- 
posteriorly. 
May 24. Transplanted bud slightly smaller than normal and 
points a little more to side. Figure 100, drawn on May 23, shows 
scarcel}^ anj^ difference between the two buds. 
Mav 28. Transplanted limb {TR) practicallv exact counterpart of 
normal (figs. 101 and 102, drawn May 29). 
Ma3^ 31. Transplanted limb has third and trace of fourth digit. 
Function normal. 
Experiment R. E. 93. May 19, 1915. Right limb bud to left side, 
dorsoventral orientation; pronephros mostly removed. 
May 21. Well healed; bud smooth and mound-hke. 
May 25. Transplanted bud points dorsoposteriorly with a second- 
ary' bud at anterior border of base. 
Ma3^ 28. Posterior bud {PR) is normal in position and orientation, 
and is even a Uttle longer than the normal limb on the opposite side. 
The other (anterior) nodule {DU) is growing into a liml) and also 
points posteriorly (figs. 103 and 104). 
]May 30. Posterior bud growing more rapidh' than other; digita- 
tions plain. Anterior bud sticks out more to side, shows trace of 
digitations. 
June 4. Two hands, each with two digits; some excrescences. Arm 
a little shorter than normal. The posterior bud is (probabh') a left, 
and its position is approximately normal. The other is mirrored from 
its dorsal surface. Both hands have faint trace of third digit. Excres- 
cences which seem to involve mainly the skin make an exact interpre- 
tation of this case difficult (fig. 105). 
