22 GYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



Mandurao, Boelongean, Eastern Borneo: No. 15. $ 19 /i 1914. Head and body: 184 mm. Tail: 

 164 mm. Hindtbot: 44 mm. Ear: 15 mm. 



Camp 6, Eastern Borneo (2,000 feet): No. 27. <$ 2S /i 1914. Head and body: 189 mm. Tail: 163 

 mm. Hindfoot: 42 mm. Ear: 16 mm. — No. 44. <£ 6 /2 1914. Head and body: 199 mm. Tail: 156 mm. 

 Hindfoot: 43 mm. Ear: 17 mm. — No. 43 a (skull only). — No. 43 b (skull only). 



I have provisionally referred the whole series collected in various parts of 

 Eastern Borneo to the form described by Lyon under the name of T. paitana. The 

 type of this form, which certainly only is a geographical race of the typical Tana 

 tana Raffles, and not as considered by Lyon a distinct species, was collected 

 at the Paitan River in Northeastern Borneo, thus a considerable distance North of 

 the localities where the present collection has been obtained. According to Lyon 

 the typical T. tana extends as far north as to the Kutei River, being replaced along 

 the Western side of the Island by two other subspecies viz. Tana tana besara Lyon 

 from the regions of the Kapuas River and Tana tana utara Lyon from more North- 

 western districts. As in Tana tana the general colouration in T. t. besara is said 

 to be rather dull and these two forms are merely distinguished from each other by 

 size. Thus the latter form is much larger having a hindfoot of 53 mm. and a 

 condylobasal length of 59 mm. against 48 mm. and 55 mm. respectively in Tana 

 tana. Tana tana utara on the contrary is of a relatively bright colouration and the 

 light areas besides the dorsal stripe are very light and greyish. The condylobasal 

 length of skull is about 53 'mm. or more, and the hindfoot measures about 50 mm. 



Tana tana. paitana merely differs from the above mentioned allied forms in 

 having the shoulder stripe bordered both above and below by the light colour of 

 the anterior back, while in true Tana tana and the other two subspecies mentioned 

 above the shoulder stripe is bordered on both sides with the reddish colour of the sides. 



In the series collected by Mr. Lumholtz the shoulder stripes are in some spe- 

 cimens resembling those found in true Tana tana while in other specimens they 

 more approach those of T. paitana. This character therefore does not seem to be 

 sufficient for creating a distinct form, but until large series of all these so-called 

 races have been properly examined, I have placed the present series under the 

 heading of Tana tana paitana, though with some reservation. 



Skull mea8urements : 



d" 

 No. 95 



No 99 



? d" v C? ef 

 No 123 ! No. 124 I No. 127 No. 27 



No. 43 a 



Greatest length of skull 58,1 



Condylobasal length of skull 54,8 



Basicranial length of skull 51,3 



Zygomatic width 25,4 



Greatest width of braincase 20,0 



Least interorbital width 14,9 



Least postorbital width 17,2 



Length of nasals mesially 24,0 



Median palatal length 33,5 



Distance between lachrymal notch and tip of 



premaxillare 30,7 



Maxillary toothrow 20,6 



56,2 

 53,0 

 49,5 

 26,0 

 19,3 

 14,0 

 17,0 



32,3 



55,2 

 51,5 

 48,2 

 23,8 

 19,6 

 14,6 

 17,3 

 21,3 

 31.1 



54,6 

 50,9 

 47,9 

 25,5 



19,4 

 14,8 

 17,8 

 21,3 

 30,5 



55,2 

 50,8 

 47,7 

 23,5 



13,3 

 1",6 

 21,5 

 30,4 



54,5 

 51,5 

 47,9 

 25,5 



14,7 



22,6 

 29,6 



55,0 

 51,1 

 47.8 

 24,5 

 19,3 

 13,9 

 17,0 

 21,8 

 30,6 



30,1 



28,9 



28,2 



28,5 



29,0 



29,2 



19,3 



18,6 



18,5 



18,7 



19,3 



19,0 



