THE SELOUS COLLECTTOX. S5 



Typical locality, Somaliland ; range extends westward as far as 

 the Tana River and valley of the Northern Gruaso Nyiro, To the 

 north of the Northern Gruaso Nyiro this llhinoceros inhabits the 

 area to the east of Lake lludolf ; it is also found in certain parts 

 of Southern Abyssinia. 



439 —19.7.15.519. 1912 (sex not recorded). Northern Guaso 



Nyiro, Kenya Colony. Length of front horn on outside 

 curve 24^ ; circumference at base 17 ; length of rear horn 

 on side 22|^ ; circumference at base 17j. 



440 —19. 7. 15. 520 (sex not recorded). Horns. 1912. Northern 



Guaso Nyiro, Kenya Colony. Length of front horn on out- 

 side curve 21 ; circumference at base 16 ; length of rear 

 horn on side 14 ; circumference at base 16|. 



SOUTH AFRICAN WHITE, OR SQUARE-MOUTHED 

 RHINOCEROS. 



Rhinoceros (Diceeos) simus simus. . 



Rhinoceros simus, Burchell, Bull. Soc. Philom. 1817, p. 97 ; Travels in 



S. Africa, vol. ii. p. 75, 1824. 

 Ceratotheriu7n simum, Gray, Proc. Zool. Soc. 1867, p. 1027 ; Cat. 



Carnivora, etc., Brit. Mus. p. 319, 1869 ; Hand-List Thick-skinned 



Mamm. Brit. Mus. p. 52, 1873." 

 Diceros simus, Thomas, Nature, vol. Ixii. p. 599, 1900 ; Proc. Zool. Soc. 



1901, vol. ii. p. 158. 

 Rhinoceros (Diceros) simus, Ward, Records of Big Game, ed. 6, p. 473, 



1910, ed. 7, p. 472, 1914 ; Lydekker, Cat. Ungulate Mamm. Brit. Mus. 



vol. V. p. 55, 1916. 

 Rhinoceros simus simus, Lydekker, Cat. Ungidate Mamm. Brit. Mus. 



vol. V. p. 56, 1916. 



Size rather larger than in bicorms with much larger head ; 

 skull very long with posterior part prolonged backward well 

 beyond the condyles. First premolar not persistent, the adult 

 number of cheek-teeth being seven. Eront horn with square base. 

 Upper lip broad and square. Prominent fleshy hump on nape of 

 neck. Ears considerably larger than in bicorms. G-eneral colour 

 rather lighter than in the Black species. The tyj)ical White 

 Rhinoceros of South Africa is very closely allied to the Nile race 



