No. -2. — The Cranial Nerves of Anolis carolinensis. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 



MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD 



COLLEGE. NO. 261. 



By William A. Willard. 

 TABLE OF CONTENTS. 



PAGE 



A. Introduction .......... 18 



B. Scope of the paper 19 



C. Material and methods 20 



D. Systematic position of Anolis ....... 22 



E. Historical statement 23 



F. Skeletal structures 24 



1. Skull 24 



2. Hyoid apparatus 25 



G. Cutaneous sense organs 25 



H. Visceral end organs 30 



I. Muscles 31 



1. Muscles of the orbit 31 



2. Muscles of the tongue 34 



3. Muscles of the hyoid apparatus 35 



4. Muscles of the jaw and neck 38 



J. Oculomotor nerve 44 



K. Trochlear nerve .......... 45 



L. Abducent nerve .......... 45 



Ciliary ganglion and nerves ....... 45 



M. Trigeminal nerve 48 



N. Facial nerve 62 



O. Glossopharyngeal nerve 71 



P. Vagus nerve .......... 73 



1. Relation between nerves IX and X .... 76 



2. A vestigial dorsal ganglion on the roots of the vagus . 77 



3. Terminal distribution of nerves IX and X ... 80 



Q. Spinal accessory nerve 85 



R. Hypoglossal nerve 88 



S. Summary on the distribution of nerves IX, X and XII . . 92 



'1\ Additional innervation to the ventral head region ... 92 



