Sirainp-Iials of K<tsl A/ricn. I'jO 



Skull: greatest length 41; basilar length o-i ; zygomatic 

 hreatlth 2(>*."5 ; hrt-adth ot' brain-case lG-3 ; length of na.^als 18 ; 

 breadth across expanded |)Oition 7'i ; dejitli from highf.st 

 point of orbit toulvoi>lar border at front of m^ IJ-k ; palatilar 

 length 18*7 ; length of upper molar series from fiont alveolar 

 border to back of m' 10. 



I/al>. Elgonyi, Mt. Elgon. Altitude 7000 feet. 



Ti/pe. Adult male. B.M. no. 10. 4. 1. 78. 



(10) Otomi/s tropicaUs vivax, subsp. n. 



Allied to 0. t. eljonis, but smaller in size and considerably 

 paler in colour. 



Dimensions of head and body markedly less than in the 

 Elgon form ; tail rather long. 



General colour of dorsal surface much paler and more 

 suffused with light brownish butT, lacking the dark wash 

 which is the dominant note in the colouring of ehjonis. 

 Flanks and sides of head rather lighter and more buff- 

 coloured than back. Muzzle and sides of face bright buff, 

 liacks of hands and feet dirty brownish buff. Under parts 

 of body pale slate-grey overlaid with bright creamy buff, 

 the general effect much lighter and more bufi-coloured than 

 in the Elgon race. 



Skull considerably smaller with much smaller teeth. 

 Nasals very much as in elgonis, the subterminal constriction 

 not quite so well defined. The lamina formula as in tropi- 

 ca/is, but the last lamiiuv of wt' is very small and not entirely 

 separated from the 6th. 



Dimensions of the type (measureil in the ties li ) : — 



Head and body 117 mm. ; tail 8.'i ; hind foot 26 ; ear 21. 



Skull: greatest length o8'4 ; basilar length l]0"5; con- 

 dylo-incisive length 353; zygomatic breadth l'J'3; inter- 

 orbital constriciion 4*2; length of nasals 16'6 ; greatest 

 wiilth across expandird part of nasals 7 ; de[)th from liighest 

 point of orbit to alveolar border in front of ;«"' 11*8 ; length 

 cf palatal foramina 7 ; postpalatal length 13*7; length of 

 upper molar series from anterior alveolar border to back of 

 i;isfc mnlur 'J ; length from anterior base of enamel on in^ to 

 back of ni^ S'3 ; greatest width of w' 2*2. 



I/ub. Mf. Nyiro, south of Lake Rudolf, East Africa. 

 Altitude 8000 feet. 



Tt//>e. Adult female. IJ.M. no. 12. 7. 1. 425. Original 

 number 'Ml. Colii-ctod by A. Blayney Percival, Esq., on 

 ]\huch 24th, U>11, and [uesentcd by him to the British 

 Museum. 



