VI PREFACE. 



especially to Dr. Ogier of Charleston, who was associated with me in my dissec- 

 tions, the result of which will be given in the Anatomy of the Genera: to Dr. 

 WuRDEMAN and Dr. Baron, who have furnished me with many beautiful prepara- 

 tions: to Dr. Ravenel, and to Dr. Geddings of Baltimore, for interesting remarks 

 on many southern Reptiles: to Dr. Harlan, for the use of his Library and 

 Manuscript Notes: to Dr. Binney and Dr. Storer of Boston, and to Mr. Wil- 

 kens of New York, for many Reptiles of the northern parts of the United States: 

 to Charles Hammond and Ogden Hammond, Esqrs., of West Chester, New York, 

 who have furnished me with many animals, together with observations on their 

 habits: and to T. L. Ogden, Esq., of Mobile, for animals sent from the south- 

 western part of the United States. To Professor Troost, of Nashville, I owe 

 many thanks for several new species of Emys, accompanied with valuable ob- 

 servations. Major Le Conte has, with a liberality that distinguishes the true 

 lover of nature, rendered me essential service, in placing at my disposal the use 

 of his notes, and his beautiful drawings of Reptiles, the labour of many years. 

 But above all am I indebted to Dr. Pickering of Philadelphia, who has aided me 

 with his accurate knowledge at every step of the work. 



Whatever merit the work may possess, must be determined by Naturalists; 

 my own wishes will be gratified, if I have restored, or given, order to North 

 American Herpetology. 



