INTRODUCTION. 



In offering the fourth volume of North American HERPETOLOGy to the pubhc, 

 I must again return my thanks for the continued aid of those gentlemen who 

 have assisted me in the former volumes. 



Among others, I would particularly thank Dr. Harden for many animals from 

 Georgia, accompanied with valuable remarks on their habits; especially the 

 salamanders and sirens, — and S. S. Haldeman, Esq., for several living reptiles 

 of Pennsylvania, including a beautiful specimen of Coluber sipedon, from which 

 the plate in the present volume was taken. 



To Dr. Barrott, of Abbeville, South Carohna, well known as an excellent 

 Botanist, I am indebted for a sight of what may be considered one of the most 

 remarkable of the North American reptiles — the Chelonura Temminckii. 



I am again, in this volume, obliged to Miss Martin, of Charleston, for a 

 beautiful drawing of the Coluber constrictor. 



