130 EOSS G. HARRISON 
C. Superposed transplantations 
13. Homopleural, clorsodorsal 
Experiment S. E. 3. April 20, 1916. Right limb bud to right side, 
normal orientation; mesoderm of host torn in posterior part of wound, 
otherwise intact. 
April 21. Well healed; limb bud considerably larger than normal. 
April 24. On operated side Hmb bud larger than normal. 
April 26. Operated hmb shghtly larger, otherwise no difference. 
May 2. Operated hmb still shghtl}^ larger. 
May 8. The two limbs exactly alike (fig. 106). 
14. Homopleural, dorso ventral 
Experiment S. E. 18. April 13, 1917. Right hmb bud to right side, 
inverted; mesoderm all left in. 
April 14. Perfectl}^ healed. 
April 17. Operated limb bud sticks out more to the side, and is 
more massive than normal. 
April 21. Operated limb double; posterior component more mas- 
sive, occupies noi'mal position; other is attached to radial border and 
points dorsoposteriorly; neither has digits. 
April 25. Reduplication of hand and part of fore arm; one com- 
ponent is in approximately normal position, the other sticks out to 
side. 
April 30. Limb has grown; relations essentially the same as before. 
May 1. Specimen preserved. The main limb projects horizontally 
to side and is inclined about 30° to the transverse plane; palm is ventral, 
ulnar border posterior. The reduplicating member with two digits is 
attached to the radial border of the wrist, pointing anteriorly r#i)d 
laterally (fig. 107). 
Experiment S. E. 10. May 26, 1916. Right hml) bud to right side 
inverted ; mesoderm of host torn along posterior border of wound and a 
httle tissue lost. 
May 27. Perfectly healed. 
May 30. Limb on operated side points a little more dorsally than 
normal. Ventro-anterior to main bud another fairly prominent mass 
of tissue (like S. E. 9, in which an extra digit developed). 
June 4. Limb on operated side considerablj^ smaller than normal, 
and still points more dorsally; digits just beginning. 
June 12. Operated hmb still less developed than the unoperated; 
third and fourth digits beginning to show. 
June 15. Practically no difference between the two hmbs; the 
operated one is possibly a little thicker. 
