42 GYLDENSTOLPE, ON A COLLBCTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



38. Rattus kina Bonhote. 



Ann. & Mag. Nat. Hist., 7 ser., vol. XI, 1903, p. 124. 



No. 117. $ Long Palabar, Boelongean, Eastern Bomeo 5 /r, 1914. Head and body: 135 mm. Tail: 

 179 mm. Hindfoot: 23 mm. Ear: 17 mm. 



In this form the fur is very thickly beset with short spines. The general 

 colouration is liglit ochraceous, much paler than in R. rapit Bonh. and interspersed 

 with numerous, rather long, blackish hairs most conspicuous on the central parts of 

 the back. Underside, including the inner parts of the limbs, whitish faintly tinged 

 with yellowish. The whitish underparts are sharply marked off from the sides of 

 the body. The tail is nearly uniform throughout its whole length and brownish black 

 in colour. The hindfeet are brownish, slightly tinged with ochraceous except on the 

 toes which are whitish. The anterior feet are whitish, slightly tinged with påle 

 ochraceous. Whiskers and long eye-bristles brownish black, whitish at the ends. 



On the skull the nasals end posteriorly in the same line as the premaxillare. 

 The supraorbital ridges are fairly well-developed though not so strong as in R. rapit. 

 The bullse are rather low and slightly flattened. 



Skull measurements (the measurements in pharenthesis are those of the type 

 specimen): Greatest length of skull: 33,5; length from condylus to gnathion: 31,6; 

 basicranial length of skull: 26,3; zygomatic width: 16,5 (16,5); greatest breadth of 

 braincase: 14,o (15,o); least interorbital width: 5,3 (6,o); length of nasals mesially: 

 13,2 (13,5); breadth of combined nasals at anterior extremity: 3,7; breadth of com- 

 bined nasals at posterior extremity: 1,6; diastema: 8,5 (9,5); palatal length: 14.5 (15,o); 

 length of foramina incisiva: 5,6 (6.o); length of upper molar series (alveoli) : 5,7(6.0); 

 length of lower molar series (alveoli) ; 5,8 mm. 



Remarks: This species belongs to the cremoriventer-growp and is very similar 

 to typical R. cremoriventer Miller (Proc. Biol. Soc. Washington, vol. XIII. 1900, p. 

 144) from the Malay Peninsula. 



39. Rattus whiteheadi whiteheadi Thomas. 



Ann. & Mag. Nat. Hist., (5 ser., vol. XIV, 1894. p. 457. 



No. 131. $ Pipoh, Boelongean, Eastern Borneo 17 /s 1914. Head and body: 122 mm. Tail: 139 mm. 

 Hindfoot: 27 mm. Ear: 18 mm. — No. 37. g Camp 6, Eastern Borneo */* 1914 (2,000 feet). Head and 

 body: 124 mm. Tail: 114 mm. Hindfoot: 27 mm. Ear: 16 mm. 



Both these specimens belong to the typical form and not to the allied R. 

 whiteheadi perlutus Thos. (Ann. & Mag. Nat. Hist., 8 ser., vol. VII, 1911, p. 205), 

 the type of which was obtained in the central parts of Northern Sarawak. These 

 two forms merely differ as to the colour of the lower parts of the body which in R. 



