TRANSPLANTATION OF LIMBS IN AMBLYSTOMA 



141 



(fig. 31). The shoulder muscles were typically developed and 

 were supplied by nerves (table 3). The muscles within the limb 

 were normally differentiated and were supplied with nerves of 

 typical intrinsic distribution. The segmental nerve supply to 

 this limb comprised the ventral rami of the second, third, and 

 fourth nerves (fig. 18). The greater part of the nerve supply 

 was derived from the latter two, although a good-sized branch 

 from the second contributed to the plexus. The second nerve, 

 in addition to supplying the anterior limb and a contributing 



Fig. 19 Dorsal view of case AA2S78, showing absence of gills and the position 

 of limb developed from rudiment transplanted into gill region (fig. 3). Animal 

 preserved fifty-nine days after the operation. X 5. 



trunk to the posterior appendage, supplied fibers to the m. 

 abdominohyoideus. No communication with the first spinal 

 nerve could be found. In this case the hypoglossal trunk was 

 formed solely from the latter, which exhibited a normal course 

 along the dorsolateral border of the m. sternohyoideus in w^hich 

 it finally terminated. The m. geniohyoideus and the m. hyo- 

 glossus were absent on the operated side. 



Case A.\2Sts. In this experiment (tables 1 B and 2 A), gill 

 development was also entirely suppressed and the transplanted 

 rudiment developed into a normal appendage (fig. 19). Its 



