o 



MINUTE STRUCTURE 



OF THE 



CENTRAL NERVOUS SYSTEM 



OF CERTAIN 



REPTILES AN DBATRACHIANS 



OF 



AMERICA. 



ILLUSTRATED BY PERMANENT PHOTO-MICROGRAPHS. 



-' BY 



JOHN J. MASON. M. D. 



SERIES A. 



J? 



.vuthor's edition, one hundred. 



Newport: 1879-1882. 



