vi INTRODUCTION. 
Number of Species and Specimens in the 
British Museum in 
1845. 1885. 
Species. Specimens. Species. Specimens. 
Iguanide ........ 83 240 211 1358 
Xenosauride .... — — 1 4 
Zonuride ........ 6 17 10 53 
Anguide ........ 16 38 26 147 
Anniellide ...... 0 — — 1 1 
Helodermatide .. 1 2 2 8 
Varanide........ 21 87 24 256 
Xantusiide ...... — — 1 7 
Tetids .......... 21 57 69 356 
Amphisbenide.... 9 21 30 145 
Total.. 157 462 375 2335 
G. A. BOULENGER. 
Department of Zoology, 
November 18, 1885. 
