io6 NATURAL SCIENCE. Aug.. 



and Southern Morocco. The Delta of Egypt must be included 

 in the Mediterranean Region, and I am not able to define the exact 

 boundary of my Sudanese Sub-Region in the north-east. The occur- 

 rence of a Centropus in the Delta shows the presence of an African 

 element even in Lower Egypt, but the regional boundary may be 

 about the second Cataract, above which no Sun-birds (Nectariniidae) 

 are found. 



III. — The West African Sub-Region. 

 This might well be called the "Afro-Malayan " Sub-Region, as it 

 possesses species of Turdimis, a Pitta, some Diceidae, and other curious 

 forms which are Malayan in their affinities. It consists of the forest 

 districts of Southern Senegambia, and embraces the whole of the 

 West African forest region from the above-mentioned point to the 

 Kwanza River, its continuity being broken at Accra, where the 

 Sudanese Sub- Region breaks through to the coast with its attendant 

 Bustards (Otides) and Hemipodes, and this will probably be found to be 

 the case at other intervals of the coast-line. The forest region may 

 also extend a little way across the Kwanza into the interior of 

 Benguela. Certainly it embraces the whole of the Congo basin as far 

 as the western water-shed of the Nile, as was shown by Bohndorff's 

 collection from the Niam Niam country and by many species obtained 

 by Heuglin and Emin Pasha in the Equatorial Province. 



IV. — The Abyssinian Sub-Region, consisting of Abyssinia and 



Southern Arabia. 



This not only embraces all the area which I assigned to it in 

 1870, but must be carried north of the Zambesi, recent explorations 

 having shown that I was mistaken in believing the latter river to be 

 a natural boundary. It may even be found to stretch, in a broken 

 and disjointed manner, far into Equatorial Africa, as proved by the 

 discovery of Chera progne and Pyromelana taha by Mr. Jackson in 

 Equatorial Africa. 



V. — The East African Region. 



This is not a very natural sub-region, and may have to be sunk 

 in one of the others ; but at present such a number of forms seem to 

 be peculiar to it that it is best to recognise it till our present know- 

 ledge of the East African avifauna has been tabulated and brought 

 up to date. 



The South African Sub-Region. 



It is to be noticed that in the map I have indicated the 

 existence of a 



I. — Cape Province. 

 By this I intend the Cape Colony south of the Karroo and 

 reaching eastwards to the neighbourhood of Port Elizabeth and East 

 London. Quite a number of distinct forms inhabit this province. 

 2. — The Natalese Province. 



