588 MR. R. LYDEKKER ox A [May 11, 



Zebra, Grant's variety of Burchell's Zebra, and Grevy's Zebra ; 

 and it is not impi-obable that in this jaw we have a relic of an 

 ancestor of one or more or of all these species. 



Is it possible to form any estimate of the size of this animal, 

 which I propose to call E. hollisi ? 



Let us compare the few measurements which we can make with 

 those of its living relatives. The distance across the four com- 

 pletely surviving incisors in the fossil is one and three-quarter 

 inches. The same measurement in my skull of a Grevy stallion 

 gives two inches, and in that of my Grant stallion two and three- 

 eighths inches. The interdental space between the canine and 

 the nearest incisor in the fossil E. hollisi is about a quarter of an 

 inch, in the Grevy three-eighths, in the Grant nearly an inch. 

 Thus, so far as these very inadequate measurements indicate, 

 the animal was more like the Grevy Zebra than the Grant, an 

 inference quite in keeping with the view that the stripe-system 

 in the Grevy is mvich older than in the Burchell family of 

 Zebras. 



As regards the actual size of the Equus hollisi, we can form no 

 estimate from the jaw measurements. Thus the Grevy stallion, 

 the measurements of the jaw of which I have just cited, stood 4 feet 

 94 inches (14"1| hands) or just the height of the true Libyan 

 horse, that is the small " Arab " not increased in height by 

 crossing with Asiatic hoi-ses. On the other hand, the Grant's 

 Zebras of East Africa seldom reach moi'e than 4 feet 2 inches 

 (12"2 hands), yet the measurement of the front of the jaAv in the 

 latter is distinctly larger than that of the Grevy stallion. Thus 

 from the present scanty data, we cannot form any estimate of the 

 height of E. hollisi, for although the front of the lower jaw is 

 much smaller than that of E. granti, it is quite possible that it, 

 like the Grevy Zebra, may have been a much larger animal. 



4. On a New Race o£ Deer from Sze-chnen. 

 By R. Lydekkee *. 



[Received April 8, 1909.] 



(Plate LXIX.t) 



Shortly before his death, I received from the late Mr. J. W. 

 Brooke a communication regarding a so-called " white deer " 

 inhabiting Sze-chuen, which was stated to be no albino, but, 

 in my correspondent's opinion, a new species. In February of 

 the present 3'ear, Captain Malcolm McNeill called at the Natural 

 History branch of the British Museum, and informed me that he 

 had just returned from Sze-chuen, where he had seen a small 

 jaarty of these deer, out of which he succeeded in shooting a hind. 



* Communicated by permission of the Trustees of the British Museum, 

 t For explauation ofthe Plate see p. 590. 



