INTRODUCTION. Xlll 



Mantell Collection. This was purchased in two parts : the first 

 from Dr. Gideon A. Mantell in 1836, and the second from his 

 executors in 1853. 



Pomel Collection. Purchased from M. J. Pomel in 1851. The 

 greater part of this collection is made up of specimens from the 

 French Miocene. 



SommeniKj Collection. Purchased from Herr Sommering in 1827. 



Spratt Collection. Presented by Admiral Spratt, C.B., in 1874 

 and 1878. Exclusively from the caverns and fissures of Malta. 



Tesson Collection. Purchased from M. Tesson in 1857. 



Toulmin- Smith Collection. Purchased in 1869 from the widow 

 of Mr. Toulmin- Smith. 



Wetherell Collection. Purchased from Mr. N. T. Wetherell, of 

 Highgate, in 1871, through Mr. J. Tennant. 



The specimens presented by Mr. C. Falconer are from the collec- 

 tion of Dr. Hugh Falconer. 



The abbreviations employed for serial publications are in the main 

 those used in the ' Geological llecord ' for 1878 ; but an explanation 

 of those used in this part has been appended. 



The metrical system is employed for all measurements. 



In conclusion, I have to express my best thanks to Mr. William 

 Davies, of the Geological Department of the Museum, for the 

 valuable information he has given me regarding the history of 

 individual specimens, and of the different collections, as well as for 

 some MS. notes. I also owe him thanks for having looked over 

 the proof-sheets of this Catalogue. My thanks are likewise due to 

 Mr. Oldfield Thomas, of the Zoological Department of the Museum, 

 for much valuable assistance in identifying existing species of 

 Mammals, and more especially in the case of the Eodents 1 . 



EICHARD LYDEKKEK. 



The Lodge, Harpenden, 



Hertfordshire. 

 Christmas, 1884. 



1 It may not be out of place to observe that, in my work on the Fossil 

 Mammals of India, published in the ' Palceontologia Indica ' (Memoirs of the 

 Geological Survey of India), ser. 10, vols. i., ii., and iii., the names employed 

 for several species of European fossil mammals are different from those given 

 in the present work. This is owing to the circumstance that I had not then 

 the time, or in many cases the means, of entering into the question of the right 

 of priority of the names employed, but merely took them on the authority of 

 other writers. Some errors in the authority for various specific names also 

 occur in that work. 



