VI 



PREFACE 



Trouessart, Mr. Theodore A. Cook — both in his 

 private capacity and as editor of The Field — Prof. 

 J. C. Ewart, and several other friends and corre- 

 spondents. 



Since the text was in type, Mr. R. I. Pocock 

 has pointed out i^The Field, Jan. 20, 191 2, p. 143) 

 that the aperture of a scent-gland situated on the 

 posterior aspect of the hind-foot of the Indian rhino- 

 ceros occupies a position very nearly similar to that 

 of the ergot in the foot of the horse (ififra, p. 41). 

 "The orifice ofithis gland," he writes, "is placed 

 suggestively near the spot corresponding to that 

 occupied by the ergot in horses, and despite the 

 accepted view that the ergot is a sole of the foot, 

 the possibility of its representing an aborted gland 

 may be wisely borne in mind. Its general resem- 

 blance to the warts or chestnuts on the legs of 

 horses, which most authorities regard as degener- 

 ated glandular structures, is quite in keeping with 

 this suggestion." 



R. LYDEKKER. 



Harpenden Lodge, Herts, 

 January 1912. 



