Mus /?-om Borneo and the Malay Peninsula. 125 



Dimensions of type (measured in the skin) : — Head and 

 body 146 millim.; tail 176 ; hind foot 26. 



Shull. — Palatal length 15 millim. ; diastema 9*5 ; length 

 of incisive foramina 6 ; length of nasals 13"5 ; zygomatic 

 breadth 16'5 ; interorbital breadth 6 ; greatest breadth of 

 brain-case 15; length of molar series 6. 



Hob. AJount Kina Balu, Borneo. 



Type. B.M. 94. 7. 2. 24. Mount Kina Balu. Collected 

 in January 1894 by Mr. A. H. Everett. 



Although from tlie skins there is apparently little difference 

 between this species and Mus cremoriventer^ the larger size of 

 the skull will enable it to be very easily recognized. Not 

 having any measurements in the flesh, it is difficult to say 

 whether it would be recognizable by its size without reference 

 to the skull. 



Mus buJcit, sp. n. 



Similar in appearance to Mus cremorivcnter, Mill., but 

 larger, approaching in size to Mus rapit. 



Fur densely studded with soft white spines. Above dull 

 ochraceous, intermixed with short black hairs. Below- 

 yellowish white. Tail bicolor and slightly longer than head 

 and body. 



Skull. — Similar to that of M. rapit, but with shorter 

 muzzle and larger bullae. Supraorbital ridges conspicuous 

 and well marked, extending backwards to inferior margin of 

 parietals. Anterior root of zygoma broad, much broader 

 than in M. rapit. 



Dimensions (measured in the flesh) : — Head and body 

 121 millim.; tail 148; hind foot 24*5. 



5^mZ/.— Greatest length 37 millim. ; palatal length 16 ; 

 diastema 9*5; length ot nasals 15; zygomatic breadth 18. 



Hah. Bukit Besar, Jalor, 2500 feet. 



Type. Ad. S- Bukit Besar. Collected 10th May, 1901, 

 by Messrs. H. C. Robinson and N. Annandale. Original 

 number 11. 



An easily distinguishable form of the Mus Jerdoni group, 

 of which there are specimens in the Museum from Siam. 

 The above is only a preliminary description ; a full descrip- 

 tion and measurements will be published in the report on 

 Messrs. Robinson and Annandale's collection. 



