EXPERIMENTS ON THE FORE LIMB OF AMBLYSTOMA 435 
TABLE 5 
Summary of results of removal of portions of the limb bud. Wounds cleaned 
RESULTING LIMB 
PART REMOVED ry ; 
Normal Reduple: Defective| Abortive | Dead Total pene 
AMTCTIOL!= secs 3 6 0 1 4 {14 (10)} 30.0 
IEG UIA. no cocoe 2 1 3 4 3 13 (10)} 20.0 
Dorsal. So oaSkesce 1 0 1 10 2 14 (12) 8.3 
Ventralet.. cee ee 8 0 0 2 4 14 (10)} 80.0 
Centrale 4 1 1 0 1 fe 6) (66R7 
MOGs 18 8 5 il7/ 14 62 (48)| 37.5 
TABLE 6 
Summary of results of removal of portions of the limb bud. Wounds not cleaned 
RESULTING LIMB 
PART REMOVED 7 
Normal | Redupl | nefective| Abortive| Dead | Total | Per cent 
JNTAT OBES sie c obec cc 12 0 1 0 Arm el3))||n 9220 
IROSterione 48 e 6 0 4 1 4 15 (1)| 54.5 
DORA es eerie ce 5 0 1 4 1 11 (10)| 50.0 
Weriital ler are ote 7 0 1 0 2 10 (8)| 87.5 
Centrale err 1 0 1 0 0 2 (2)| 50.0 
PRO Galle No rac 31 0 8 5 11 A) ORS) 
limbs, but cannot be regarded as a fair sample of what the oper- 
ation may effect. 
During the season of 1917 the experiments have been greatly 
augmented in number, and with results which seem rather 
different. There has been a large proportion of cases with 
defective or completely inhibited development of the operated 
limbs, although no specific correlation between the part re- 
moved and the character of the defect has been observed. As 
in the experiments with whole limb buds, a much higher per- 
centage of perfect limbs has resulted when the wound is not 
cleaned. The results of the experiments in the two classes of 
cases are given in Tables 5 and 6. 
Those with cleaned wounds (Table 5), including all which 
were covered with grafted skin, will be considered first. In this 
