No. 2. — CONTRIBUTIONS FEOM THE ZOOLOGICAL LABORATORT 

 OF THE MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 

 COLLEGE, UNDER THE DIRECTION OF E. L. MARK, No. 172. 



The Development of the Oculomotor Nerve, the Ciliary Ganglion, 

 and the Abducent Nerve in the Chick. 



By Frederic Walton Carpenter. 



TABLE OF CONTENTS. 



Introduction 142 



Part I. — Anatomy and Histology 143 



A. Historical Survey . . . 143 



a. Anatomy 143 



1. Eye-Muscle Nerves . . 143 



2. Ciliary Ganglion . . 144 



b. Histology 147 



1. Oculomotor Nerve . . 147 



2. Abducent Nerve . . . 147 



3. Ciliary Ganglion and 



Short Ciliary Nerves . 147 



B. Observations 161 



a. Metliods 151 



b. Anatomy 152 



1. Eye-Muscle Nerves and 



Ciliary Ganglion . . 152 



0. Histology 155 



1. Oculomotor Nerve . . 155 



2. Abducent Nerve . . . 155 



3. Ciliary Ganglion . . 156 

 Part II. — Development .... 169 



A. Historical Survey . . . 159 



1. Fishes 160 



2. Amphibians 167 



3. Reptiles 167 



4. Birds 169 



5. Mammals 171 



B. Observations 176 



176 



1. Methods 



2. Development of the Ocu- 



lomotor Nerve, the Cil- 

 iary Ganglion, and the 

 Abducent Nerve ; de- 

 scribed by Stages 



177 



