42 Mr. 0. Tliomfis on 



number of fine hairs not forming a fringe ; under surface of 

 legs and interfemoral nearly naked. General colour above 

 dark bistre-brown, the tips of many of the hairs conspicuously 

 contrasted silvery buff, those on the forearms, rump, and 

 hind limbs more ochraceous buff; under surface duller 

 brown, the bases of the hairs dark slaty, the tips of some of 

 the hairs whitish. 



Ears of medium length, anterior border strongly convex, 

 posterior with a sharp concavity just below the tip. Tragus 

 long, curved outwards, its base with a small lobule exter- 

 nally succeeded above by an emargination. 



Upper incisors unusually short, their enamel-covered 

 portion but little longer than the projecting part of their 

 root, the inner one bicuspid, its posterior cusp as thick as and 

 half the height of the anterior. Outer incisor also bicuspid, 

 owing to its basal ledge being raised up postero-iiiteriially as 

 a second cusp half the height of the maiu cusp. Middle 

 premolar about two-thirds the height and area of the anterior 

 one. Outer lower incisors tricuspid, the outer cusps half as 

 large as the median one. Middle lower premolar rather 

 smaller tlian the subequal first and last. 



Dimensions of the type (the starred measurements taken in 

 the flesh by the collector) : — 



Forearm 32 mm. 



Head and body *4.5 ; tail *45 ; ear *13'5 ; tragus on 

 inner edge 5*5 ; thiid finger, metacarpal 31, first phalanx 15 ; 

 lower leg and foot (c. u.) 21. 



Front of upper canine to back of m^ 5*1 ; front of lower 

 canine to back of m^ 5'5. 



Bab. Bitye, Ja River, S.E. Cameroons. 2000'. 



I'l/pe. Adult male. Original number 564. Collected 17th 

 October, 1911, by Mr. G. L. Bates. 



This well-marked species resembles K. cerosa in colour, 

 but is much smaller, the forearm of that animal being 37 mm. 

 in length. By the characters used in Dobson's synopsis it 

 comes nearest to K. lanosa, but differs both by size and 

 colour, and, as from every other, by its peculiarly short and 

 deeply bicuspidate upper incisors. At Bitye ]\Ir. Bates also 

 obtained the little K. muscilla and an additional specimen of 

 K. smithii, described by me in 1880. The latter is slightly 

 larger than K. ciqyrosa and has practically unicuspid outer 

 lower incisors. 



Colomys hicolor, sp. n. 



Larger and darker coloured than C. gosJingi. 



Size decidedly greater than in C. goslingi^ as shown by 



