THE CRANIAL NERVES OF AMPHIBIA. 



A CONTRIBUTION TO THE MORPHOLOGY OF THE VERTE- 

 BRATE NERVOUS SYSTEM. 



OLIVER S. STRONG. 

 Columbia College. 



ANALYSIS OF CONTENTS. 



Introduction 

 I. Technique . 



PAGE 

 lOI 



103 



II. Detailed Description of the Nerves and Their Components 106 



1. Trigeminus j^^ 



2. Facialis and Actisticus jj2 



3. Glossopharyngeus and Vagus l-ic 



4. Sympathetic jcq 



5. Recapitulation of nerve components I ci 



III. Comparative Morphology of Components ic^ 



1 . General cutaneous i r-, 



2. Special cutaneous or lateral line leg 



(a) Amphibia j rg 



(b) Fishes ,66 



(c) Resume I^g 



3. Fasciculus Communis ,80 



(a) Amphibia 180 



(b) Higher Vertebrates 185 



(<:) Fishes 188 



4. Motor ic)7 



5. Comparison with Cyclostomes ig»S 



IV. General Considerations 201 



1. Relation 0/ Cranial attd Spinal Nerves 20I 



2. Relations of the Pre- and Post-Auditory Nerves 206 



3. Bearings ttpon the Classification and Segmentation of the Nerves.... 208 

 V. Appendix on Technique 211 



Introduction. 



This research may be regarded as, in a manner, a continua- 

 tion of Professor Osborn's work on the Amphibian brain. In 

 the introduction to his paper, "A Contribution to the Internal 

 Structure of the Amphibian Brain" (Journ. of Morph., Vol. 



