disappears from human vision. I myself have seen a small herd of 

 Grevy Zebras standing under a tree in the Duke of Bedford's Park, 

 Woburn Abbey, with the sunshine glistening down on them against a 

 light background, become almost invisible. The vanishing effect is 

 only transitory, however, and from other points of view they again be- 

 come conspicuous. 



The Grevy is readily distinguished as the largest of the zebras. It is 

 characterized b>- delicate striping, a very long head, and very large, 



rounded ears, like those of 

 many other forest-loving ani- 

 mals. Its narrow striping 

 contrasts very strongly with 

 the broad and brilhant stripes 

 of the Grant zebra, which, 

 as shown in Fig. 6, so com- 

 pletely surround the bodj' 

 that they unite with a black 

 line e.xtending along the under 

 surface of the belly. Grant's 

 zebra, like the Grevy, has a 

 very conspicuous set of hori- 

 zontal stripes extending down 

 the legs to the hoofs, and is 

 t hus readily distinguished 

 from the Chapman zebra in 

 which the lower portion of 

 the leg is ciuite pale. 

 The Grant Zebra is ty]iical of a very large group entirely distinct 

 from the Grevy and Mountain zebras. It is broadly known as the 

 Burchell grouj), the type of which was the zebra found and described by 

 the English explorer Burchell north of the Orange Ri\er, which roamed 

 north of that stream as the Quagga roamed to the south. In the 

 typical Burchell zebra (E. burchelU, now believed to be almost extinct) 



[34J 



Fig..-), the (ilJEVY ZEBRA. FIJOM 

 AF.YSSINIA 



Distinguished by sharply defined and very 

 numerous narrow wliite and dark chocohite 

 stripes, and by a very lieavy dorsal strijie 

 which is CMUitinned down the center of the tail. 



