Prefatory Note. 



The Museum gratefully acknowledges the co5peration of the 

 New York Zoological Society in the preparation of this Leaflet The 

 author is Curator of Reptiles at the New York Zoological Park, Bronx 

 P^rk Through Director W. T. Hornaday the abundant hvmg 

 material of the Zoological Park was placed at the disposition of the 

 AU^eum for the purpose of making photographs for the illustrations; 

 and through Director C. H. Townsend similar courtesies were extend- 

 ed at the New York Aquarium, Battery Park. 



Mention should also be made of the valuable assistance rendered 

 In- Mr Herbert Lang of the Museum, who took the photographs from 

 which thirtv-seven of the half-tone illustrations (Figs. 4-^- 10-12, i5, 

 ,7, 21-47) were Prepared. The remaining photographs were fur- 

 nished bv the author. 



The collection to which the Leaflet refers may be found at 

 ■ present in the Svnoptic Hall, No. 107 of the ground floor of the Museum 

 buUding. The animals may be seen in the flesh at the Zoological 

 Park and the Aquarium. 



