440 ROSS G. HARRISON 
Ss 
De aes 
ID OZ. 
: (em 
aye ; 
e 34 
36 
35) 
3 
\ 2 
3 
\ 
Oo 
2 4 
iD 
s 
4 
B Was 3 
OYE ee ai 
Figs. 29 to 37 Effect of removal of portions of the limb bud (continued). 
Lateral view of limbs in all figures except figure 30. X17. Figure 29. Experi- 
ment Rem. E. 48 (removal of anterior half); arm foreshortened, but hand not; 
radial reduplication of hand; twenty-seven days after operation. Figure 30. 
Experiment H. E. 6 — (anterior half removed) ; ventral view; radial reduplication 
of hand more complete than in last case; thirty-nine days after operation; the 
arrow points headward. Figure 31. Experiment Rem. E. 52 (removal of ante- 
rior half); A, normal tetradactylous limb; B, operated limb, with double hand, 
considerably foreshortened; twenty-seven days after operation. Figure 32. 
Experiment Rem. E. 28 (anterior half removed); arm considerably foreshort- 
ened, probably reduplicated internally; first digit double (1D); N, nodule at 
