VI INTRODUCTION. 



In an " Appendix " the accessions to the Collection are enumerated 

 that have been made since the publication of the two preceding 

 volumes, as well as the additions to the literature, thus bringing the 

 work up to date. The total number of species of Lizards regarded 

 as well established amounts to 1G16, 120G are in the Eritish 

 Museum, represented bj' 9820 specimens. 



"With the object of rendering the account of the Laceriidce and 

 Scincidce more perfect, I have devoted a month to the examination 

 of the specimens in the Berlin Museum. I beg to express my best 

 thanks to Prof. E. von Martens, not only for giving me access to the 

 rich collection under his charge, but for much personal kindness. 

 I am also deeply indebted to my friend Dr. J. von Bedriaga for the 

 communication of advanced proof-sheets of the work on the genus 

 Lacerta, which he has recently published, as well as for other 

 assistance which T received from him whilst prepaiing my revision 

 of that genus. My friends Dr. Boettger and M. F. Lataste have, 

 as usual, most kindly granted all my requests for the loan of 

 specimens, and besides I am indebted to them for much valuable 

 information. Among the many others who have kindly assisted 

 me in the preparation of this work, through loan, exchange, or gift 

 of specimens, I must specially mention Dr. A. Strauch, Prof. L. 

 Vaillant, Marquis G. Doria, Prof. H. Giglioli, Dr. L. Camerano, 

 M. L. DoUo, and M. A. Bavay. 



G. A. BOULEXGEll. 



Department of Zoology, 

 December 17, 1886. 



