CRANIAL NERVES OF CAECILIANS 



541 



.^-V^O-'^sp.S 



Figs. 38 to 40 Cross-sections of the anterior trunk region, left half, of Herpele ; 

 sections 339, 378 and 403. X 12.5. 



4. The raiyius intestino-accessorius X 



After giving off the branchial nerves, the continuation of the 

 IX-X trunk consists of visceral sensory and visceral motor fibers. 

 It runs directly posteriorly from the trunk ganglion, giving off 

 two branches to the levator arcuum branchialium muscle (figs. 



38, 44, lab.) At a level slightly posterior to the roots of the 

 third spinal nerve the ramus intestino-accessorius curves ven- 

 trally around to the lateral border of the digestive tract (fig. 

 40, int.-acc), dividing into an anterior laryngeus recurrens, of 

 motor and sensory fibers, distributed to the interbranchialis 4 

 and laryngeal muscles and adjacent mucous epithelium (figs. 



39, 40, 44, lar.rec), a medial sensory branch that passes 



