some neio Fur-ms o/Otomys. 313 



and presented by Col. Sloggelt. Seventeen specimens 

 examined. 



All the examples of the 0. unisalcatus group hitherto seen 

 have the grooves on the upper incisors clear and well defined, 

 but the series from Deelfontein have these grooves shallow 

 and indistinct, and in some cases (e. g.^ no. 2. 9. 1. 52) they 

 are scarcely or not perceptrble at all to the naked eye. This 

 would seem to be a local peculiarity worthy of a subspecific 

 name. 



Otomys Broomi, sp. n. 



Size and tooth-characters of 0. unisulcatus. General 

 colour far paler, the back between " drab-groy " and " drab " 

 of Ridgway. Sides greyer and passing evenly into the pale 

 whitish buffy of the tips of the belly-hairs. Long bristle- 

 hairs of rump unusually numerous, broadly tipj^ed with 

 whitish. Face like back; eye-rings not marked in the 

 general pale colour. Ears very large, their surface covered 

 inside and out with short pale buffy hairs ; the long hairs at 

 their anterior base broadly tipped with whitish ; postauricular 

 patch large and prominent, dull whitish. Upper surface of 

 hands and feet pale yellowish white. Tail long, thickly 

 haired, dark brown above (in one specimen scarcely darker 

 than the back), dull white on sides and below. 



Skull as in 0. unisulcatus, with clear and well-defined 

 incisive grooves, but the bullai, in correlation with the large 

 external ears, are also perceptibly larger than in that species, 

 although nothing like the huge swollen bullae of 0. BrantsiL 



Dimensions of the type (measured in the flesh) : — 



Head and body 159 millim. ; tail 102 ; hind foot (s. u.) 28 ; 

 ear 27. 



Skull : greatest length 35 ; basilar length 28 "5 ; zygo- 

 matic breadth 18-2 ; nasals 14 x 4*7 ; interorbital breadth 4'6 ; 

 interparietal 4'4 X 7-5 ; palate length 16 4; diastema 8'2; 

 palatal foramina 6*5; length of upper molar series 7*5; 

 length of bulla 8 (in second specimen 8*2). 



Bab. Port Nolloth, Little Namaqualand. 



Type. Female. B.M. no. 98. 9. 3. 4. Collected 25th 

 March, 1897, and presented by Dr. R. Broom. Two speci- 

 mens. 



This animal is evidently a pallid desert representative of 

 0. unisulcatus, with the enlarged ears so commonly found in 

 desert animals. 1 have great pleasure in naming it after its 

 captor, to whom the National Museum is indebted for some 

 very interesting and valuable Namaqualand animals. 



Ann. (£• Mag. N. Hist. Ser. 7. Vol. x. 23 



