Five new Mammals from Java. 377 



Cranial measurements : total length 35*3 ; condylo-basilar 

 length 29'9 ; diastema 9*0; upper molar row 6*0; length of 

 palatal foramina 6*1 ; median length of nasals 13*3 ; breadth 

 of nasals 4*2 ; zygomatic breadth 16*0. 



Specimens examined. — Twenty-four adult and many imma- 

 ture specimens all from the vicinity of the type-locality. 



Ef marks. — This species, which is the lowest-ranging of the 

 forest-rats of the group on the Gedeh Volcano, is very 

 uniform in coloration and degree of spiniuess, therein differing 

 from R. Jraternus, which is variable in both respects. From 

 R. bukit of the Malay Peninsula it differs in its brighter, 

 less clayey colouring, less stiff spines, and finer annotation 

 of the tail. From R. orbus of the northern parts of the 

 Malay Peninsula in its smaller size, relatively shorter tail, 

 and lack of pectoral markings. 



Rattus cremoriventer cretaceiventer, subsp. n. 



Type. — Adult male (skin and skull) collected at Tjibodas, 

 West Java, 4500 ft., on February 22ml, 1916, by H. 0. 

 Robinson. Federated Malay States Museums, no. 256/16. 

 Original number 7263. 



Characters. — A rat of the group represented in the Malay 

 Peninsula by Li. cremoriventer (Miller) and in Borneo by 

 A', kina and R. rupit (Bon bote), but pelage longer and less 

 spiny, colour duller, and with the belly almost chalk-white 

 with only a faint tinge of cream. Teeth decidedly heavier 

 and interparietal foramina narrower. Bullse larger and 

 broader. 



Colour etc. — Pelage of the type usual in rats of the group, 

 composed of three elements, viz., long black piles with pale 

 tips or subterminal bands ; broad, flattened, grooved spines, 

 greyish green in colour, with datk tips and a woolly underfill*, 

 grey at the base, with ochraceous-buff tips. General colour- 

 effect above a mixture of buff, drab, and black, the latter 

 more evident on the median line, the sides more rufous buff. 

 Head and sides of the face more brownish, the muzzle pale 

 chocolate-brown, hands and feet silvery whitish, with narrow 

 brown median streak, the hairs very short. Below white, 

 sharply separated from the colour of the sides, the hairs white 

 to the base, longer and less spiny than in the allied races. 

 Tail brownish, coarsely ringed (about nine to the centimetre 

 at the base), well clad with fine dark brown hairs increasing 

 in length towards the tip, which is distinctly pencillate. An 

 indication of a rufous-buff collar, which'is interrupted in the 

 middle. 



Skull. — The cianial portion relatively shorter and broader 

 Ann. cf; May. JS. Hist. Ser. 9. Vol. iv. 28 



