108 NERVOUS SYSTEM OF VERTEBRATES. 



There'is a^large cutaneous component in the VII nerve which is 



FIG. 51. A reconstruction of the cranial nerves of a cyclostome fish, Petromyzon 

 dorsatus, to show the arrangement and distribution of the several systems of nerve 

 components. Sym., sympathetic trunk; 2 g. c., second gill cleft. 



