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 1616. 1206 are in the British 
Museum, represented by 9820 specimens. 
With the object of rendering the account of the Lacertide and 
Scincide 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 I received from him whilst preparing 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. Dollo, and M. A. Bavay. 
G. A. BOULENGER. 
Department of Zoology, ~ 
December 17, 1886. 
