AUTHORS ABSTRACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE, NOVEMBER 18 



THE CRANIAL AND ANTERIOR SPINAL NERVES OF 

 THE CAECILIAN AMPHIBIANS 



H. W. NORRIS AND SALLY P. HUGHES 

 The Zoological Laboratory of Grinnell College 



FORTY-FOUR FIGURES 



CONTENTS 



Introduction 490 



Material and methods 493 



The olfactory nerve 497 



The optic and eye-muscle nerves 503 



The trigeminal nerve 510 



1. The roots and ganglia of the trigeminal nerve 510 



2. The ramus mandibularis V 515 



3. The ramus maxillaris V 517 



4. Small nerves arising from the Gasserian ganglion 519 



5. The ramus ophthalmicus profundus V 520 



6. General reflections upon the trigeminal nerve 522 



The facial nerve 524 



1. The roots and ganglia of the facial nerve 524 



2. The ramus palatinus. VII 525 



3. The truncus hyomandibularis VII 527 



4. The ramus ophthalmicus superficialis VII 529 



5. Lateralis components in the facial nerve of the larva of Ichthyophis.. 530 



The auditory nerve 530 



The glossopharyngeal and vagus nerves 531 



1. The roots and ganglia of the IX-X complex 531 



2. The glossopharyngeal or first branchial nerve 538 



3. The second branchial nerve 539 



4. The ramus intestino-accessorius 641 



5. General considerations on the glossopharyngeal and vagus nerves. . . 544 



The occipital nerve 545 



The first spinal nerve 547 



The second spinal nerve 549 



The third spinal nerve 550 



The fourth, fifth, and sixth spinal nerves 552 



The sympathetic chain 552 



General statements 555 



Literature cited 556 



489 



THE JOURNAL OF MOHPHOLOGT, VOL. 31, NO. 3 



