Volume XII 



1902. 

 THE 



Number 3 



Journal of Comparative Neurology. 



THE CRANIAL NERVES OF AMBLYSTOMA 

 TIGRINUM. 



By G. E. CoGHiLL. 



With Plates XV— XVI. 



CONTENTS. 



Introduction. Purpose and Plan of the Work. Scope of Part First. 

 Methods employed. Scope of Part Second. Definition of 



Terms. Acknowledgements ..... 207 



PART FIRST. 



a description of the cranial and first two spinal nerves of 



amblystoma tigrinum ..... 209 



7. The Olfactory Nerve ..... 209 



II. The Optic Nerve ...... 210 



III. The Eye-Muscle Nerves ..... 210 



/. The Oculomotorius . . . . . 210 



2. The Trochlearis . . . . .213 



J. The Abducens . . . . . 213 



^. Trigeminal Twigs to the M. Legator Bulbt . . 214 



IV. The Trigeminal, Facial and Auditory Nerves . 215 



a. the roots and ganglia .... 215 



/. The Ganglia and Origin of the Roots . . 215 



The Roots of the Trigeminus . . . .216 



The Lateral Line Root . . . . 217 



The Auditory and Communis Roots . . .218 



The Motor Root of the Facialis . . . 219 



B. the rami of the trigeminal and facial nerves . 219 



/. The Ramus Ophthalmicus Profundus V . .219 



2. The Truncus Infra-orhitalis . . ■ 223 



J. The Ramus Ophthalmicus Superficialis VII . . 224 



4. The Truncus Mandibularis V . . . 225 



5. The Truncus Hyomandihularis . . ■ 226 



6. The Ramus Palatinus .... 229 



2. 



3- 

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