128 ROSS G. HARRISON 
nearly parallel to the original, is mirrored in an ulnopalmar plane 
(fig. 76, drawn June 13). 
Experiment R. E. 134. May 25, 1916. Right limb bud to left side, 
dorsodorsal. Pronephros removed. 
May 26. Perfectly healed. 
May 29. Transplanted bud, normal size and position, points antero- 
dorsally ca. 45°. 
June 2. Limb points dorsally and somewhat laterally. Reduplicat- 
ing bud on anterior border near base also points dorsally and slightly 
anteriorly. 
June 5. Limb points anteriorly into gills, is short and massive. 
Three distinct digits, irregular. 
June 12. Specimen preserved (fig. 77). Arm short and thick, 
internal reduplication, certainly from elbow down, miri'ored in ulno- 
palmar plane. The two hands nearly separate; each has two long 
digits and nodular third. The main limb is a right (not reversed) and 
the other a left. No posterior reduplication in this case. 
Experiment R. E. 69. May 12, 1915. Right hmb to left side, dorso- 
dorsal orientation. Pronephros left in. 
May 13. Wound well healed. Only a small area at ventroposterior 
border of wound uncovered. 
May 15. Transplanted and normal budsa eqully prominent; former 
points anteriorly. 
May 21. Transplanted limb double. Smaller (originally main) 
part (fig. 86, PR) points anteriorly and is borne upon the posterior 
portion, DU, which is an almost normal looking limb, though smaller 
than the normal on the opposite side. 
May 24. The posterior liud has grown materially and is normal 
looking with two digits. The anterior ])ud is relatively much less 
developed (fig. 87). 
Ma.y 27.- The original bud is reduced to a small spur (PR) on the 
lateral surface of the reduplicating bud, which is almost as large as the 
normal limb on the opposite side (fig. 88, drawn one day later). 
June 3. Transplanted limb perfectly normal. Spur much reduced. 
June 7. Spur reduced to a nodule (fig. 89, PR). 
10. Heteropleural, dorsoventral 
Experiment R. E. 80. May 18, 1915. Right limli bud to left side, 
dorsoventral orientation. Pronephros removed. 
May 19. Crescentic band ventroposterior to l)ud still uncovered. 
May 21. Limb Imd almost normal in size points posteriorly. 
May 24. Limb Inid points posteriorlv, l)ut more sharplv laterallv 
than normal (fig. 93, TR). 
May 80. Limb points dorsoposteriorly angle of 45°. 
June 2. Limb stiff and projects rather more to side than normal; 
has two digits and slight indication of third on dorsal border (fig. 94, 
drawn June 1). 
