I08 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, secondjgill cleft. 



