AUTHOR 8 ABSTRACT OF THIS PAPER ISSUED 

 BY THE BIBLIOGRAPHIC SERVICE, MARCH 8 



THE CRANIAL, OCCIPITAL, AND ANTERIOR SPINAL 

 NERVES OF THE DOGFISH, SQUALUS ACANTHIAS 



H. W. NORMS AND SALLY P. HUGHES 

 The Zoological Laboratory of Grinnell College 



FIFTT-THREE FIGURES 



CONTENTS 



Introduction 294 



Material and methods 296 



The olfactory nerve 296 



The optic and the eye-muscle nerves 306 



The trigeminal nerve 320 



1. The roots and ganglia of the trigeminal complex 320 



2. The radix mesencephalica V 327 



3. The ramus ophthalmicus profundus V 330 



4. The ramus ophthalmicus superficialis V 332 



5. The ramus maxillaris V 336 



6. The ramus mandibularis V 337 



The facial nerve 339 



1. The lateral-line roots and ganglia of the facial nerve 339 



2. The roots and ganglia of the facialis proper 346 



3. The ramus ophthalmicus superficialis VII 347 



4. The ramus buccalis VII 348 



5. The ramus oticus VII 348 



6. The truncus hyomandibularis VII 350 



The ramus mandibularis externus VII 350 



The ramus mandibularis internus VII 352 



The ramus hyoideus VII 352 



7. The ramus palatinus VII 353 



8. General reflections upon the facial nerve 353 



The auditory nerve 355 



The glossopharyngeal nerve. . : 356 



1. The roots and ganglia in the glossopharyngeal nerve 356 



2. The lateral-line elements in the glossopharyngeal nerve 356 



3. The ramus supratemporalis IX 358 



4. The first branchial nerve 358 



The vagus nerve 360 



1. The lateral-line roots and ganglia of the vagus nerve 360 



2. The roots and ganglia of the vagus nerve proper 362 



3. The ramus supratemporalis X 366 



293 



