Iti!) 



ON SIX NEW MAMMALS FKoM I'HK 

 MALAY PENINSULA AND ADJACENT ISI^ANDH. 



Bv HEuiJKirj' L\ liUiilXSOX, c.m.z.s., axd C. iMUiKN KLOHM. r.«... 



"OECENT work on lli<' collections of the Sdannor Miiwuin lut« 



shown that the following six races of Mulavuu iiuiiiiiiuiIh atv 

 sufficiently distinct to merit descj-iption : 



1. MLS RATTUS RIMI'IA, ««'>*/,. «„,-. 



Type.— Adult male (skin and skull), No. 250 09, Solan^'or Muii««uij>. 

 Collected on Pulau Rumpiu, Sembilau Islands, olY the Pcrak coimt. 

 W. Malay Peninsula, by E. Seimund, on the 7th Mardi, 1I»09. 



Characters. — Like MasraitH>>j(thjrenxi.'^, Bonh., from the nuiinlamJ 

 of the Malay Peninsula, but considerably larger and diirkt-r abovf 

 owing to the reduction of the ochraceous element in the p«'lat;e. Tlw* 

 skull is more robust and the l)ull£e relatively larger. 



Colour. — Above mingled ochraceous and sooty-brown. j»aler and 

 somewhat greyer on the sides and darker on the rump and the miHlian 

 line of the back owing to the presence of numerous long bhu'k brintlefl. 

 Under surface creamy white to the l»ases of th<' hairs, fairly clearly 

 defined from the sides. 



Under surface of scrotum greyish brown. Hands and foot flf«h 

 coloured, very thinly clad with pale hairs, darker on the median lino of 

 the feet. 



Skull and Teeth. — Apart from its much larger size and luon- 

 massive build, the skull of the present form is distinguished from lliat 

 of M. r. jalorensis by the larger and moi-e dilated bulla> and by th«' 

 relatively shorter palatal foramina. Viewed from alwve. the routruui 

 is much heavier and broader, the cranium is more ehjngated and fl.it t*-!!.-. I 

 and the postorbital ridges are heavier and more sharply defleot«««l 



Apart from their greater size, tli<» teeth do not differ. 



Measurements.— Collector's external mea.suivnienth t.ikeii m tb« 

 flesh : head and body, 180 (HVr>*) ; tail. 207 (17',') : hind f.wt. 39 (80) : 

 ear, 23 (18) mm. 



Cranial measvu-ements : greatest length, 44.8 (41.5); Ijambir 

 length, 37.0 (33.9); palatilar length. 2L5 (19.1); breadth iM-twwn 

 anterior molars, 4.5 (3.9;; length of palatal forammu. 7.6 ^7.1;, 

 breadth of rostrum at anterior extremity of foramina, 7.3 (6.8); 

 diasteina, 12.0 (11.9) ; length of upp;'r molar row. 7.8 (7.1); modi*n 

 length of nasals, 15.8 (15.(>) ; greatest breadth of combin.^1 na*.tl« 4.H 

 (42); interorbital breadth, 7.0 ((Jl) ; cranial bmulth. 1«.5 (15.2); 

 zygomatic breadth, 21.0 (19.0) mm. 



The extern.il measurements of twelve spec-iraen* ttvomffo as follow.. 

 the fi'-'ures in parentheses iudicatinu' the extv 

 bodv, 184 (175-2!>:)) : tail, 209.8 (195-213) : In 

 ear,' 22.7 (21-24). 



* Mcusurcments in imrcnthcses nro thoso <if i>^ 

 frnin Bnkit Jong, Trenpimnu (Solnnirnr Mu»omn. N 



