800 ALETS 
EXPLANATION OF PLATE XXXIV. 
Fic. 52. Dorsal view of the branchial arches and the floor of the mouth cavity, 
with the muscles and nerves in place. The cranium has been entirely removed 
excepting a small piece where the levator muscles have their origin. On the 
left side the transversus dorsalis and the retractor arc. branch. dors. have been 
removed. X 1. 
FIG. 53. Same as above, with the muscles entirely removed on the left side so 
as to show their insertions on the branchialarches. On the right side the levator 
muscles are cut about the middle of their length, and the vagus nerve is turned 
medianward and downward so as to expose its branches. The ventro-lateral sur- 
face of the nerve is thus shown in the drawing. X 134. 
