Vlll INTRODUCTION. 



Edward Doubleday, Esq. 

 Richard Hai'lan, M.D. 

 Jacob Green, M.D, 

 Dr. Macau ley, 

 W. Ogilby, Esq. 

 May be regarded as the illustrative of the North American 



species described by Say, Harlan, Green, Holbrook, 



and other American authors. 

 Capt. Sir Edward Belcher (from Rio), 

 Thomas Bell, Esq. (W. Indies), 

 Sir William Burnett, R.JV. 

 E. Cooke, Esq. 

 J. Cottle, Esq. (W. Indies), 

 Edw. Cross, Esq. 

 Lady Essex (Demerara), 

 Dr. Hancock (Demerara), 

 R. Reward, Esq. (W. Indies), 

 Mr. Kerr (Bahia), 



Edward Laforest, Esq. • 



A. Ludlam, Esq. 

 Sir James Macgrigor, 

 W. E. MacLeay, Esq. (Cuba), 

 Mrs. Parker (Para), 

 Col. Edward Sabine, R.E. (Demerara), 

 J. P. G. Smith, Esq. and Mrs. Smith (N. Brazil), 

 Lord Stuart de Rothsay ("Brazils), 

 J. E. Winterbottom, Esq. (W. Indies), 

 J. Wright, Esq. (Trinidad), 



As the illustrations of the species from Tropical and South 



America and the West Indies, described by Sir Hans 



Sloane, Brown, Wagler, Spix, Gravenhorst, Guilding, 



and others- 



The specimens purchased or procured in exchange from 

 The Leyden Museum, as the types of the species described 

 and figured by Dr. Schlegel, in his Fauna of Japan 

 and in his Abbildungen, and by Dr. S. MuUer in his 

 work on the Reptiles of Neiv Guiyiea, Borneo, ^c. 

 The South African Museum, as the types of the species de- 

 scribed by Dr. A. Smith, in his Illustrations of the 

 Zoology of South Africa. 



