HIPPOPOTAMI!) 1. 391 



Nearly allied to typical race, but with the orbits more 

 prominent ; distinguished from H. a. australis (infra) by the 

 much shorter and wider facial region and the more forward 

 direction of the orbits. 



10. 9. 30. 1. Skull, provisionally referred to this race. 

 Lagos, Southern Nigeria. 



Presented ly J. R. Norman, Esq., 1910. 



15. 2. 3. 1. Skull, very large, provisionally referred to 

 this race. Zaria Province, Nigeria ; collected by Capt. G. F. 

 Abadie. Presented ly Major-Gen. H. E. Abadie, C.B., 1915. 



C. Hippopotamus amphibius kiboko. 



Hippopotamus amphibius kiboko, Heller, Smithson. Misc. Collect. 

 vol. Ixi, no. 22, p. 1, 1914. 



Typical locality Lake Naivasha, British E. Africa. 



Type in U.S. National Museum, Washington. 



Size smaller than in typical race, colour lighter, and ears 

 and tail-tip more thickly haired than in If. a. australis ; 

 skull with very broad nasals, relatively small rostral con- 

 striction, and great elevation of orbits and occipital crest 

 above the deeply hollowed interorbital region. The orbits 

 are more nearly circular than in //. a. australis, and more 

 prominent than in H. a. eonstrictus, which also differs by the 

 greater rostral constriction and shorter mandibular symphysis. 



14. 1. 7. 1-2. Two skulls, provisionally referred to this 

 race. Lower Baringo Valley, B. E. Africa. 



Presented ty G. Elaine, Esq., 1914. 



D. Hippopotamus amphibius eonstrictus. 



Hippopotamus eonstrictus, Miller, Smithson. Misc. Collect, vol. liv, 



no. 7, p. 1, 1910. 

 Hippopotamus amphibius eonstrictus, Heller, Smithson. Misc. Collect. 



vol. Ixi, no. 22, p. 1, 1914. 



Typical locality Angola. 



Type in U.S. National Museum, Washington. 



Skull lighter than in typical race, with the preorbital 

 constriction deeper, the upper surface more flattened, the 

 muzzle less expanded, the mandibular symphysis shorter, 

 and the cheek-teeth smaller. 



No specimen in collection. 



