32 ^Ir. E. Scliwaiz on neio 



but distinctly less expanded behind than in H. a. australis. 

 llostrum broad, tubular, not constricted. Lower jaw shorter 

 than in amphibius, especially the corpus, whereas the ramus 

 is almost as broad. Cheek-teeth series shorter, as a whole, 

 than in H. a. amphibius, m^ being much larger {lUs of lower 

 jaw much larger than iHo ; in amphibius m^ is of about the 

 same size as nio), whereas the anterior cheek-teeth are much 

 smaller. Canines apparently also weaker than in H. a. 

 amphibius. 



Dimensions of type skull. Basal length 600 mm. ; oecipito- 

 nasal length 563 ; occipital width 293 ; zygomatic width 327 ; 

 postorbital width 300 ; breadth of rostrum across roots, of 

 canines 277 ; facial constriction in front of for. anteorb. 115 ; 

 nasals, length 387, posterior breadth 122 ; length of upper 

 tooth-row (alv.) 243 ; length of lower 7n^ (lower margin of 

 enamel) 73. 



The hippopotamus of the Lake Chad region is nearly 

 allied to H. a. amphibius of the Nile, in which the orbits are 

 less projecting ; from H. a. australis of the Cape this race is 

 at once distinguished by tlic much shorter and broader face 

 and the orbits being laid forwards. 



A more detailed account of the local races of Hippopotamus 

 will be given in a subsequent paper. 



Bubulis lelwel modesttis, subsp. n. 



lype locality. Bahr Keeta, N.E. of Ft. Archambault, 

 Upper Shari district. 



Type. ^ old. Senckenberg Museum. Journal nos. 355 

 (skin), 166 (skull). Original no. 141. Collected in February 

 1911 by Dr. H. Schubotz. 



Most nearly related to B. I. tschadensis, but smaller and 

 darker. 



Colour of mantle dull reddish brown ("bistre,^' Rep. de 

 Cinil.), dark on j)ostcrior l)ack (323.3), paler anteriorly 

 (323.2) and on Hanks (323.1) ; undcrparts, thighs, and 

 shoulders pale ochraceous bulf ("buff," 301). 1). Top of 

 licad and back of ears deep reddish brown like posterior 

 back, face much lighter ; chin with a sharply defined 

 brownish-black spot. As in B. I. tschadensis, a narrow seal- 

 l)r(nvn band round hoofs continuous with a large si)ot above 

 iioof, and a stripe to the wrists and hocdis of the same colour. 

 'J'ail-crest and tip black, base light ochraceous buff. 



Skull. Much as in B. l. tschadensis, except its much inferior 

 size. Horns much sn)aller than in tschadensis; tips slightly 

 curved, but much less so than in /.'c'//«r/6'//si.<;, slightly diverging 



