44 QYLDENSTOLrE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNBO. 



Skull measurements : 



? 



ef 



No. 116 



No. 115 



49,0 



51,2 



45,9 



48,5 



43,0 



46,1 



24,8 



25,8 



18,2 



17,7 



7,1 



6,3 



19,2 



20,6 



5,1 



5,6 



23,0 



24,2 



7,7 



7,4 



8,1 



8,3 



Greatest length of skull 



Length from condylus to gnathion 



Basicranial length of skull 



Zygomatic width ... 



Greatest width of braincase 



Least interorbital breadth 



Length of nasals mesially 



Breadth of combined nasals anteriorly 



Median palatal length 



Length of foramina incisiva 



Length of upper toothrow (alveoli) . 



41. Rattus infraluteus Thomas. 



Ann. & Mag. Nat. Hist., 6 ser., vol. II, 1888, p. 409. 



No. 72. <£ Kaboerau, Eastern Borneo 3 /» 1914. Head and body: 216 mm. Tail: 264 mm. Hindfoot: 

 43 mm. Ear: 22 mm. 



Quite a typical species of this large Rat. It is allied to the Råts belonging to 

 the muelleri-group and is uniform dark brown above, some of the hairs having light 

 glistening tips. Underparts of the body dirty greyish buff. Underfur dark grey and 

 intermixed among the hairs of the lower fur there are some long, light glistening 

 stiff hairs of a spiny character. 



This species has hitherto only been recorded from Borneo. 



Skull measurements : Greatest length of skull: 52, i; length from condylus to 

 gnathion: 50,o; basicranial length of skull: 46,7; zygomatic width: 25,8; greatest width 

 of braincase: 17,5; least interorbital width: 7,i; length of nasals mesially: 20,i; breadth 

 of combined nasals at anterior extremity: 5,8; breadth of combined nasals at posterior 

 extremity: 2,2; diastema: 14,4; median palatal length: 23.5; length of foramina in- 

 cisiva: 8,3; greatest breadth of combined foramina incisiva: 3,i; length of upper 

 toothrow (alveoli): 8,4; length of lower toothrow (alveoli): 8,5 mm. 



42. Rattus neglectus Jentink. 



Notes Leyden Mus., vol. 2, 1880, p. 14. 



No. 5192. J 1 Toembang Maroewe, Central Borneo, Sept. 1915. — No. 5159. £ Toembang Maroewe. 

 Central Borneo, Sept. 1915. — No. 120. £ imm. Long Palabar, Boelongean, Eastern Borneo 8 / 5 1914. — 

 One specimen (imm.) without label from Central Borneo. 



None of these specimens are fully adult, and it is with great hesitation that I 

 have referred them to H. neglectus Jent. which, however, is a common species though- 

 out Borneo. 



