198 SIR HARRY H. JOHNSTON ON [Mar. 21, 



extends westwards into Sierra Leone, where the Senegalese type 

 of buffalo is met with. This last may be distinguished fi"om the 

 Congo Buftalo by its slightly longer horns with less expanded 

 bases, and by the tendency to black in the colour of the hair*. 

 Liberia is also, I believe, the westernmost range of the Diana 

 Monkey. 



This country is chiefly remarkable, as regards the possession of 

 peculiar species of mammals, for the Liberian Hippopotamus, the 

 Zebra Antelope {Ceplialophus dorice), Jentink's Duiker, and 

 Biittikofer's Monkey. It is not to be supposed that these 

 creatures carefully discriminate between the political boundaries 

 of Sierra Leone, Liberia, and the Ivory Coast ; and in all proba- 

 bility as a zoological district one may have to include within the 

 limits of Liberia a portion of the eastern part of Sierra Leone and 

 of the western part of the Ivory Coast, where the dense Liberian 

 forests extend across the political frontiers. But, so far as present 

 research goes, the creatures above named appear to be restricted 

 in their distribution to the Liberian area. I do not think any 

 trace of the Liberian Hippopotamus has been found in any other 

 part of Africa. As regards the zebra-striped Duiker, it was 

 thought at one time that its existence on the northern borders of 

 the Congo watershed had been discovered by Dr. Junker ; but the 

 portions of the skin of this Zebra Antelope v/hich he obtained 

 were in all probability part of a young foim or a dwarf species of 

 Okapi. 



It has been said that the Common Hippopotamus existed in the 

 lower reaches of the Cavally River, and Avas formerly found in 

 the St. Paul's River. I saw none of them on the latter stream, 

 and all my European coi-respondents den}^ the existence in any 

 Liberian river (entering the Gulf of Guinea) of the big 

 Hippopotamus, which, hoAvever, is present in the larger streams 

 flowing towards the Niger. As regards the Dwarf Hippopotamus, 

 it is met with in most parts of Liberia, wherever European 

 explorers have penetrated. I have little to add to Biittikofer's 

 description of its habits, except that I think that he insists too 

 strongly on its predilection for a terrestrial life. According to the 

 statements of European and native observers, it lives a good deal 

 in the water. 



The Zebra Antelope is not met with close to the coast, but is 

 fairly abundant in the hilly regions of the interior. It would 

 seem to be very common in the Kelipo country to the west of the 

 upper Cavally, and also on eithei- side of the upper St. Paul's 

 River. The skins which I was able to exhibit came from 

 the Kelipo country, and were collected by Mr. Maitland Pye- 

 Smith. 



Since I have mentioned the name of this collector (who has 

 also sent me three Chimpanzee skulls and the skull and teeth 

 of a Pygmy Hippopotamus), I might state that he forwarded me 



* According to Captain d'Ollone, the Senegambian (black) Bufl'alo is found in 

 Novthern Liberia, the Coigo or Red Buffalo in the Southern forest-region. 



