INTRODUCTION. 



With the present Part the Catalogue of Fossil Reptilia and Amphibia 

 in the Museum is completed. 



The Supplement contains such Reptilian remains as have been 

 acquired by the Museum since the previous Parts of the work were 

 published, as well as those which had not been put in their proper 

 serial position when the work was commenced, and consequently 

 did not come under the author's notice in time to be recorded in the 

 earlier parts. Certain modifications and amendments in classifica- 

 tion are also recorded in the Supplement. I am again indebted to 

 Mr. Davies for revising the proof-sheets ; and my thanks are like- 

 wise due to Mr. J. C. Mansel-Pleydell for permission to use the 

 woodcuts numbered 62-64:, before their appearance in the ' Proc. 

 Dorset Nat. Hist. Soc.,' for which they were drawn. 



I may state that in the diagnosis of the Synaptosaurian branch 

 given in Part II. the statement that sclerotic plates are absent 

 applies only to the Sauropterygia. 



The Baber Collection, mentioned for the first time in this Part, 

 was purchased in 1889 from the executors of the late Mr. J. Baber, 

 of Knightsbridge. 



RICHARD LYDEKKER. 



Harpenden, 

 April 3rd, 1890. 



