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remaining four cases were normal. In the early stages, however, 
all of the latter gave evidence of reduplication (fig. 123). The 
limb bud, when it first appeared, showed two distinct nodules or 
prominences, one of which developed into a normal limb. In 
Figs. 121 and 122^Transplantation of half limb bud (comb. 6, fig. 120) ; pos- 
terior right to anterior right (hom.dv.). Exp. H. E. 31. Partial reduplication 
of hand, mirror plane being radiodorsal. Arm and medial hand homopleural. 
1 to 4, numbers of digits of main hand; 2', 3', digits of reduplicating member. 
Fig. 121 Outline of normal (N) and operated (TR) buds from above, nine 
days after operation (free-hand sketch). 
Fig. 122 Ventral view, preserved specimen twenty-one days old. X 10. 
Figs. 123 and 124 Transplantation of half limb bud (comb. 7, fig. 120) ; dorsal 
right to ventral right (hom.dv.). Exp. H. E. 2. Operated limb slightly thicker, 
reduplicating member reduced to a nodule (S). 
Fig. 123 Outline of operated limb, dorsal view eight days after operation 
(free-hand sketch). 
Fig. 124 Ventral view preserved specimen, twenty days old. X 10. 
