52 GYLDENSTOLPE, ON A ÖOLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



51. Tragulus kanchil hosei Bonhote. 



Ami. & Mag. Nat, Hist., 7 ser., vol. XI, 1903, i>. 2'JÖ. 



No. 94. $ iinm. Long Pangian, Boelongean, Eastern Borneo '/j 1914. Head and body: 445 mm. Tail: 

 H* mm. Hindfoot: 124 mm. Ear: 37 mm. 



This single specimen, though immature, belongs to the kanchil- group and has 

 probably to be referred to the race described by Bonhote on specimens from the 

 Baram River in Sarawak. In his work on the Mammals collected by Dr. W. L. 

 Abbott on Borneo and some of the small adjacent Islands (Proc. U. S. Nat. Mus. 

 vol. 40, 1911, p. 66) Lyon considers the Chevrotians of the kanchil-growp from 

 the western and south-western parts of Borneo identical with the race found in 

 eastern Sumatra viz. Tragulus kanchil longipes Lyon, while those found in northern 

 Borneo belong to Tragulus kanchil hosei Bonh. On account of the lack of material 

 I am at present unable to ascertain if Lyon's opinion is correct or not. 



Skull measuremenls : Greatest length of skull: 84,2; condylobasal length of skull: 

 77.5; basicranial length of skull: 70.5 ; occipitonasal length: 79, o; zygomatic width: 

 39,7 : greatest breadth of braincase: 32, o; least interorbital width: 22,2; least postor- 

 bital width: 31,3; breadth of combined nasals anteriorly: 6,8 ; breadth of combined 

 nasals posteriorly: 10,7 ; length of nasals mesially: 21, g; median palatal length: 50, i; 

 length of bullas : 17, i mm. 



Appendix I. 



A nominal list of the Mammals at present kiiown to inliabit the mainland of Borneo. 



In the following pages I have put together a list of the Mammals hitherto 

 obtained on the mainland of Borneo. Up to the present time 234 species or sub- 

 species of Mammals have been obtained, but as several of the interiör parts of the 

 great Island are still unexplored, it is highly possible that more forms have to be 

 added to this list. But it also seems the present author possible, that some of the 

 so-called »subspecies» have to be withdrawn from this list as they may only have 

 been based upon individual variation. For instance the Oriental Squirrels undergo 

 a certain amount of both individual and seasonal variation, a case which may have 

 been overlooked by some authors when creating new forms. But in the following 

 list I have for the sake of convenience put together these forms under separate 

 headings, though several of the subspecific names then certainly only will become 

 synonyms to the typical race. When Hose in 1893 wrote his >Descriptive account 

 of the Mammals of Borneo» he only mentioned 144 species as inhabiting the Island, 

 but now we may consider that at least about 230 species are found. 





