198 Ci'ossing the North mid South African Ostrich 



similarity. Without being biassed in either direction it appears to the 

 writer to make for convenience to regard them as distinct under the 

 names bestowed by Linnaeus and Gurney. 



DESCRIPTION OF PLATE VII. 



Fig. 1. Outer surface of fore-wing of ostrich, with plumes clipped off, to show arrange- 

 ment of wing quills on upper (post-axial) border and rows of upper-coverts. 

 The claw on the bastard wing is not visible. 



Fig. 2. Under surface of fore-wing of ostrich which is naked except for the single, incom- 

 plete row of under- coverts. 



Fig. 3. Egg of North African ostrich (to the left) and South African ostrich (to the 

 right). 



