2o6 Journal of Comparative Neurology. 



7. The Ramus Palatinus Caudalis . . . 230 



8. Accessory Ttvigs of the Trigeminus . . 230 

 V. The Glossopharyngeus AND Vagus .... 231 



A. THE ROOTS AND GANGLIA .... 23I 



/. The Lateral Line Root ..... 232 



2. The Root of the Glossopharyngeus . . . 232 



J. The Second Root of the Vagus .... 233 



4. The Third Root of the Vagus . . . 234 



5. The Fourth Root of the Vagus . . . 234 



B. THE RAMI OF THE VAGUS AND GLOSSOPHARYNGEUS . 235 



/. The Truncus Glossopharyngeus . . . 235 



2. The First Truncus Branchialis Vagi . . 238 



J. The Second Truncus Branchialis Vagi . . 239 



^. The Ramus Supratemporalis Vagi . . . 24O 



J. The Ramus Auricularis Vagi .... 241 



6. The Ramus Lateralis Superior Vagi . . 24 1 



7. The Truncus Visceralis Vagi .... 242 

 VI. The First two Spinal Nerves .... 245 



/. The First Spinal Nerve .... 245 



2. The Second Spinal Nerve .... 247 



VII. RESumE OF Part First ..... 248 

 PART SECOND. 



A COMPARATIVE DISCUSSION OF THE CRANIAL NERVES OF AMBLYSTOMA 253 



I. The Olfactory Nerve ..... 253 



II. The Innervation of the Eye Muscles . . . 254 



III. The Trigeminal and Facial Nerves . . . 255 



/. The Roots and Ganglia .... 256 



2. The Ophthalmicus profundus and Maxilliiris V . 258 



J. Minor Branches of the Trigeminus . . . 262 



^. The Lateralis Component of the Facialis . . 263 



5. The Branchial Rami op the 2". Hyomandtbularis . 264 



6. The Rami Palatini . . . .271 



IV. The Glossopharyngeus and Vagus . . . 272 



/. The Roots . . . . . .272 



2. The Lateral Line Component . . . 273 



J. The R. Communicans IX -\- X ad VIL . . 274 



^. Jacobson^s Anastomosis .... 276 



5. Rami Pre-trematici . . . . . 277 



6. Rami Post-trematici ..... 279 

 V. The First Two Spinal Nerves . . . .281 



/. The Motor Component . . . . 28 1 



2. The Cutaneous Component . . . .281 



VI. Conclusions ...... 282 



Literature Cited ....... 285 



Decription of Figures ...... 287 



