PKEFACE 



THE preparation of the fourth Volume of Ungulate Mammals 

 was nearing completion when its author was struck down 

 by the illness that proved fatal. With his characteristic 

 devotion to work, he hardly allowed this to make any 

 difference, under circumstances when most men would have 

 considered themselves unfit for mental effort. It would 

 perhaps have been better if the patient had allowed himself 

 to rest, but the correction of the proofs went on until the 

 task was completed, only two or three days before the end 

 came, on April 16th. 



Mr. Lydekker, although not a member of the permanent 

 staff, had been officially connected with the Museum 

 since 1884. Only those who have seen the work from the 

 inside will be able to realise the extent and the value of his 

 services to the Museum, where his colleagues have the 

 remembrance of a long and highly successful period of help 

 unremittingly and ungrudgingly given. 



The present Volume includes the families Cervidre, 

 Tragulidae, Camelidse, Suidse and Hippopotamidse, thus 

 completing the Artiodactyla. Like its predecessors, it has 

 been prepared by Mr. Lydekker. 



It was hoped that the Catalogue would be completed 

 shortly by the publication of a fifth Volume, including the 

 Perissodactyla, the Hyracoidea, and the Proboscidea, together 

 with addenda to the earlier volumes. It is not possible at 

 present to state whether this intention can be carried out. 



SIDNEY F. HAEMEE, 



Keeper of Zoology. 



BRITISH MUSEUM (NATURAL HISTORY), 

 LONDON, S.W. 



April 19th, 1915. 



808432 



