PEE FACE 



The preparatiou of the fourth A^olume of Ungulate ^lammals 

 was nearing completion when its author was struck down 

 hy the illness that proved fatal. With his characteristic 

 devotion to work, he hardly allowed this tn 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 belli 

 unremittingly and ungrudgingly given. 



The present A'olume includes the families Gcrvidas 

 Tragulida?, Camelidfe, Suida' and Hippopotamida?, thus 

 completing the Artiodactyla. Like its predecessors, it has 

 lieen prepared by Mr. Lydekker. 



It was hoped that the Catalogue would be completed 

 shortly by the publication of a fifth A'olume, including the 

 I'erissodactyla, the Hyracoidea, and the Proboscidea, together 

 with (idikiuhi to the earlier volumes. It is not possible at 

 pi-esent to state whether this intention can be carried out. 



SIDNEY F. HAEMKi;, 



Kcrjter uf Zoology. 



JiKiTisH Museum (Natuk.\l Histokyi, 

 London, S.W. 



April \Wi, 1915. 



