Straw f-Hu's cj East Africa. 



ir.7 



Skull : pioatcst lonptli 38*6 ; basilar KMijjtli 31 ; zygo- 

 matic breadth 20; breadth of l)raiii-ca.se IG'5; length of 

 nasals 17 ; grt'jito.st width :uto.s.s expatidcl portion 7'1 ; 

 depth from highest poitjt of orbit to alveolar border at front 

 of m' 13*2 ; palatilar length J 7 ; length of upper molar series 

 from front alveohir border to back of m^ 9*G. 



tlah. Teliki Valley, west slope of iMt. Kenya. Altitude 

 13,000 feet. 



lifpe. Old male. B.M. no. 0. 2. 1. 21. 



(7) Otoinys orestes dollmam', Hell. 



Otomys nrestes dollmam, Heller, Smith. Misc. Coll. vol. lix. no. 10, 

 p. (1012). 



Agrees with orestes in that 7>P possesses only 6 laminre, 

 but skull le?s arched and narrower, with smaller bulUe and 

 teeth, and pelage considerably darker in colour. 



The specimens of this Gargues (Urguess) Otomys collected 

 by ^Ir. Blayney Percival are, unioitunatcly, too young to be 

 of any .<?ystematic use. 



In colour this race would appear to be similar to tropicaUs, 

 i. e., a rich tawny olive above and slate-grey sutl'uscd with 

 brownish buff below. 



The dimensions given by Ileller are : — 



Head and body 150 mm.; tail S8 ; hind foot 25 ; ear 21. 



Skull: greatest length 37*4; basilar length 29'2 ; zygo- 

 matic breadth 18'1 ; interorbital constriction 4*9 ; nasals 

 17*2x7; postpalatal length 12; length of upper molar 

 series (alveolar) 8*1. 



Mr. Heller, when describing this form, mentioned that he 

 had five si)ecimens from the type-locality all agreeing in 

 laminal formula*, i. e., m' with only G lamina?. 



J/ah. :Mt. Gargues (Mt. Urguess). Altitude 7000 feet. 



Sedioii ir. 



Skulls williout any marked elovation of the intcrorhital region, the 

 penrrnl line of the brain-caso nearly horizontal anteriorly, hj* with 

 7 laminae. 



Group 1. 



Nn.-als not exceptionally broad anteriorly (not more than 8 mm. in 

 width) ; transition i'rom broad to narrow n-gion marked by a distinct 

 angle, resulting elfect rather spoon-shaped. 



(8) Otomys tropicalis, Thos. 



Otomys irroratus tropicalis, Thos. Ann. &, Mag. Xat. Hist. (7) vol. i. 

 p. 314 (1902). 



A dark brownish-buff-colouied species, distinguished from 



