INTRODUCTION. 



A list of all tHe specimens of Shield EeptUes in the British 

 Museum. They are arranged as they are described in — 



I. The Catalogue of Shield EeptUes. Part I. Testudinata, 



dto, 1855 ; the Supplement, 4to, 1870; and its Appendix, 

 4to, 1872. By Dr. J. E. Gray. 



II. The Catalogue of Shield EeptUes. Part II. Emydosau- 



rians, EhynohooephaUa, and Amphisbasnians, 4to. 1872. 

 By Dr. J. E. Gray. 



The new species or improvements in the arrangement of the 

 animals that may have been discovered since the pubUcation of 

 these works have been adopted, and a reference made to where 

 they have been described. 



When any of the specimens have served as the types of a 

 description or figure of the species in any scientific work, 

 reference is made to where the description and figure are to be 

 found. 



Whenever the specimen has been presented or obtained 

 directly from a collector, the name of the presentor or collector, 

 and the habitat sent with the specimen, has been recorded 

 immediately after the specimen, but the far greater number 

 of the specimens have been obtained from dealers with only 

 the most general habitats. 



The condition in which the specimen is preserved, its size, 

 and often the age and sex, when known with certainty, are 

 recorded. 



