Prate XII 
Fig. 40 Spinal cord and nerve fibers on the operated side of the second brachial somite in Experi- 
ment 69. 
Fig. 41A Brachial plexus on the normal side and, B, on the operated side of Experiment 60. 
Fig. 42A First brachial nerve and, B, the second brachial nerve on the operated side of 
Experiment 706. 
C. Brachial plexus on the normal side of Experiment 706. 
Fig. 43A Sciatic plexus of Amblystoma tigrinum, Experiment 25, normal side, 33 days after the 
first removal of the limb bud. 
B_ Sciatic plexus of the operated side of the same specimen. For explanation, see text. 
