1927] Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo AS7 
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Map 13. Zodgeographic regions of the Belgian Congo. 
A. West African Subregion. 
1. Lower Guinea Forest District. 
2. Ubangi Savanna District. 
3. Southern Congo Savanna District. 
4. Uganda-Unyoro Savanna District. 
B. East African Subregion. 
5. Eastern Montane District. 
6. East African Highland District. 
7. Rhodesian Highland District. 
The East and South African Subregion on the other hand comprises 
(1) a Humid Montane Province, present in the EasterN MONTANE 
District of the eastern Congo borderland; (2) a Sudanese Province and 
(3) a Northeast African Province, both not entering the Belgian Congo; 
and (4) an Eastern and Southern Province, represented in our territory 
by (a) the East ArricaAn HigHuanp District and (b) the RHODESIAN 
HIGHLAND DistTrict.! 
1This is J. P. Chapin’s Angolan Highland District. We prefer to use the present term because this 
district occupies the major part of Rhodesia, while Angola proper (viz. the northern half of Portuguese 
West Africa) is entirely excluded from it. 
