Sicanip-Iiats of East Africa. 



153 



may be taken tor this species also, as in general colour tlio 

 two t'ornis are exactly tlio same. 



h>kull larger and heavier ; molars considerably longer, nj' 

 with ti well-defined laminae. Lower incisors exactly as in 

 denti, i. e., with only one groove. 



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



lleaJ and body 159 mm.; tail 101; hind foot 28'5 ; 

 ear 22. 



iSkull : greatest length 40'5 ; basilar length 3;Vii ; condylo- 

 incisive length '■iH'2 ; zygomatic breadth 21 ; interorbital 

 constriction 4 ; squamosal breadth of brain-case 15'7 ; length 

 of nasals 1G*3 ; greatest witlth across expanded part of 

 nasals 7 ; breadth across middle of nasals (taken just behind 

 the anterior expanded portion) i'7 ; depth from highest point 

 of orbit to alveolar border at front of in^ 12'2 ; palatilar 

 length 10*2 ; length of palatal foramina 7'8 ; postpalatal 

 Kngth l-l'l; length of upper molar series, from anterior 

 alvrolar border to back of last molar, 8*9 ; length from 

 anterior ename!-basc of ??i' to back of m^ 8*5; greatest widtii 

 of m^ 2*5. 



Jiah. Burunga, ^It. Mikeno, Congo Beige. Altitude 

 GOOO feet. 



Ti/pe. Old male. B.M. no. 11. 12. 3. 110. Original 

 number 22U0. Collected by Mr. liobin Kemp on June Gth, 

 I'Jll. 



The 6 laminae of m^ immediately separate this form from 

 the Kuwenzori denti. 



Mr. Kemp obtained in all a dozen specimens of this inter- 

 esting Olomi/s, six from the type-locality and six from 

 Buharaba, near Lake Kivu, Congo Beige. 



Division D. 



Lower incisors •witli one dwp outer groove and one very shallow iuntr 

 groove. Ventral surface of tail light. 



Section I. 



The members of this section all possess skulls exhibiting n marked arched 

 appearance, the interorbital region being conspicuously elevated and 

 the nasals and brain-case so depressed as to accentuate this humped 

 or arched character. (This condition is also found in Division C, 

 •Section I.) 



Group 1. 



m' with 7 lamina}. 



(3j Olomys thomasif Osg. 



Otomys thomasi, Osg. Field Mus. Nat. Hist. Publication, 14], Zool. 

 8er. vol. x. no. 2, p. l> ^ 11)10). 



This species is immediately known by its curious arched 



