156 Journal of Comparative Neurology. 



XII. — Comparison with Acipenser and Lota 366 



XIII. — Summary of the Trigemino-facial Complex 369 



Section 8. — The Sympathetic Nervous System. ... 372 



Summary of Section 8 381 



Section 9. — The Eye-muscle Nerves 381 



I.— The Eye-Muscles 381 



II. — The N. Abducens 384 



III.— The N. Trochlearis 385 



IV. — The N. Oculomotorius 386 



V. — Critique of the Eye-muscle Nerves 389 



VI. — Summary of Section 9 393 



Section 10. — The Optic Nerve 394 



Section 11. — The Olfactory Nerve and Nasal 



Organ 395 



Section 12. — General Considerations 397 



I. — The Ramus Lateralis Accessorius 397 



II. — Metamerism 407 



III. — The Usurpation of Nerves 415 



IV. — Embryological Problems 417 



Section 13. — Conclusions 419 



I. — General 419 



II. — Recapitulation of the Nerves 423 



I. — The Spinal Nerves 423 



2. — The Vagus 424 



3. — The Glossopharyngeus 425 



4. — The Auditory Nerve 425 



5. — The Facialis 426 



6. — The Abducens 427 



7. — The Trigeminus 427 



8. — The Trochlearis 427 



9. — The Oculomotorius 428 



III. — Review of the Cranial Components 428 



I. — The General Cutaneous System 428 



2. — The Acustico-lateral System 429 



3. — The Communis System 430 



4. — The Motor Components 430 



IV. — Special Results 433 



The Literature Cited 435 



Description of Figures 445 



