SYMMETRY IN TRANSPLANTED LIMBS 133 
two digits being partly syndactylous. Reduplication is radial. The 
anterior hand (which is a left) has two long digits and a well-developed 
third. 
Experiment H. E. 2. April 18, 1916. Dorsal half of right limb bud 
(inverted) in place of ventral right (fig. 120, 7). 
April 19. Healing good, but a groove dividing the liml) region 
horizontally still indicates line of suture. 
April 21. Two rather distinct humps on operated side; larger one 
ventro-anterior. 
April 26. Operated limb bud nearly normal, but there is a bud-like 
projection on the anterolateral border (fig. 123, »S). 
May 1. Transplanted limb larger than normal. The anterior proc- 
ess is now a spur at elbow of the main limb, which is nearly normal. 
May 8. Preserved. The operated limb, especially above the elbow 
is a little thicker, but is otherwise normal. The spur is a nodule just 
above elbow on radial border (fig. 124). 
Experiment H. E. o. April 12, 1910. Posterior half of right limb 
bud (inverted) in place of anterior right (fig. 120, 6). 
April 13. Perfectly healed except for minute uncovered area at 
dorsal border. 
April 17. Operated limb bud double; large posterior bud points 
normally, but is not so large as normal; anteroventral bud is much 
smaller; it is clear that foi^mer is developing out of the remaining half 
of the limb bud of the host, while the latter is from the graft. 
April 20. Both buds have grown; posterior one points more dorso- 
laterally than normal and shows first beginnings of digitations; anterior 
bud prominent, rounded, no digitations; the two are separate to base. 
April 25. Posterior member is fan-shaped, with three long digits, 
and beginning of ulnar digits on each margin; anterior member much 
shorter, with faint indication of digitations. 
April 30. Posterior member has a symmetrical fan-shaped five- 
digitate hand; as a whole it is a right limb, as indicated by elbow bend. 
Anterior member much shorter and thicker. 
May 21. Specimen preserved. The posterior memljer has a doul^le 
hand, of which the posterior is a right and the anterior a left. The 
anterior member is a nearly normal right, with the hand a little twisted 
and syndactylous second and third digits (fig. 125). This is an anoma- 
lous case. 
Experiment H. E. 13. May 3, 1917. Posterior half of right limb 
bud (inverted) in place of anterior half (fig. 120, 6). 
May 4, Perfectly healed. 
May 7. Two distinct though small limb buds, one ventro-anterior, 
the other dorsoposterior. 
May 10. Two buds united at base; ])oth project sharpl}^ laterally 
and shghtly posteriorly. 
May 14, Two limbs; bifurcation in Y-form about at elbow. Ante- 
rior member shows two digits; posterior, none. 
