276 Mr. R. C. Wrougliton on 



(14) Otomys irroratus nyikce, subsp. nov. 



97.10.1.107, 112-114, 117, 277, 290, 291. Nvika 

 Plateau, B.C.A. {Sir H. Johnston). Alt. 6500'. (Tvpc B.M. 

 no. 97. 10. 1. 107, an adult c? .) 



Rather smaller than typical irroratus, with the usual 

 brown colouring of the northern species. Unfortunately 

 the body-dimensions were not recorded by the collector, but 

 the following may be accepted as normal for the species : — 



Head and body 170 mm.; tail 70 ; hind foot 27 ; ear 20. 



Skull: greatest length 41 ; basilar length 34; zygomatic 

 breadth 20; length of upper molar series 9 ; bullre 7. 



The extraordinarily broad, flat, spatulate nasals serve to 

 separate at once this from all other forms. 



(15) Otomys typus. 



Oreo7ni/s typus, Ileuglin, Reis. N.Ost.-Afr. ii. 1877, p. 76. 

 Oreinomi/s typus, Trouess. Cat. Mamni. i. p. 469 (1899). 

 Otomys 'jDeyeni, Thos. P. Z. S. 1902, ii, p. 311. 



2. 9. 9. 19. Slioa, Abyssinia. 



When describing his Degeni, Thomas seems to have had 

 some doubt that it was identical with Otomys typus of 

 Hcuglin : more recently the receipt of the type skull from 

 the Stuttgart Museum for examination has confirmed this 

 doubt. The dimensions recorded by Mr. Thomas for Degeni 

 are : — 



Head and body 160 mm. ; tail 90 ; hind foot 28-5 • ear 22. 



Skull: greatest length 38; zygomatic breadth 19*7; 

 length of upper molar series 95 ; bulhc (absent). 



This species is easily distinguishable from other forms of 

 the group wdth a double groove on the lower incisor by the 

 presence of eight laminse in m^. 



(16) Otomys Jacksoni. 

 Otomys Jacksoni, Tlios. Ann. Sc Mag. Nat. Hist. vol. vii. p. 2 (1891). 



93.2.3.34-35. Mount Elgon, Uganda {Jackson). Alt. 

 13,200'. 



A rather small Otomys with the warm northern colouring. 

 The dimensions arc : — 



Head and body 120 mm. ; tail 50 ; hind foot 26. 



Skull: greatest length 36; basilar lengtii 28; zygomatic 

 breadth 18 ; length of upper molar scries 8*5 ; bulhe 6. 



The small size and long soft fur are marked characters, 

 but the presence of seven laminai in ;«' is of itself amply 

 sufficient to distinguish Jacksoni from either of the other 



