30 ARKIV FÖR ZOOLOGI. BAND 10. :N:0 2(). 



Nose to vent= 165; Tail=175; Hindfoot =- 33 mm. 1 $ 1-/5 

 1915. Nose to vent=193; Tail-=190; Hindfoot =- 33,5 mm. 



In their general colouration both these specimens re- 

 semble Rattus rattas jalore.nsis Bonh. thoiigli they are deci- 

 dedly paler. The tails are much longer and unicolonrous. The 

 skull also reminds of that of the former species but is narrower 

 and the nasals do not taper quite as much. 



Skull raesaurements: Greatest length — 40, 2 ; length 

 from condylus to gnathion =-= 38,i ; basicranial length =- 35,6; 

 zygomatic width^-lT,?; greatest width of brain case=^15,2; 

 least interorbital width = 5,7 ; length of nasals mesially = 13, o ; 

 breadth of oombined nasals at anterior extremit}^ = 4,o; 

 breadth of oombined nasals at posterior extremity^ = 1,4; 

 diastema = 10,7 ; length of foramina incisiva = 7,8 ; length of 

 upper toothrow~6,3 mm. 



12. Rattiis coiicolor Blyth. — I 2 ^V^. 1915. Nose to 

 vent -= 120; Tail = 125; Hindfoot = 23 mm. 



Perfectly identical with specimens from Northern Siam 

 and the Siamese Malaya. 



Skull mesaurements: Greatest length = 30,4; length from 

 condylus to gnathion = 27,7 ; basicranial length =-- 25,5; zygo- 

 matic width = 13,5; greatest width of brain case= 12, ,0; least 

 interorbital width — 4,7; length of nasals mesially =- 10,5; 

 breadth of combined nasals at anterior extremity = 3, o; 

 breadth of combined nasals at posterior extremity = 1,4; 

 diastema — 7,1 ; length of foramina incisiva = 5,3; length of 

 upper toothrow = 4,s mm. 



13. 8us cristatus jubatus Miller. — 1 ? 'V^ 1915; 1 J" 

 1^4 1915; 1 c? ^Vi 1915. 



Unfortunately the two males are not fully adult, but on 

 the last lower molar there are three cross-ridges and a large 

 terminal heel, all of which are point of characteristics to 8. c. 

 jubatus. This species differs from the other known species 

 in the Malay Peninsula (Sus vittatus peninsularis Miller) by 

 the above-mentioned characters, while in the latter species 

 the last lower molar bas not more than three cross-ridges, 

 the posterior one often reduced to a single median tubercle. 



The sprinkling of reddish bristles on the posterior half 

 of the back as recorded by Kloss (Journal Straits Branch 



