150 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



SJcull and teeth. — They do not differ materially from those of 

 Tana tana; the rostrum is, perhaps, a little wider in T. chrysura 

 than in species commonly seen on Borneo. 



Measurements. — Type : Head and body (from dried skin) , 240 ± mm ; 

 tail (from dried skin), 160± ; hind foot, 52; zygomatic width, 29; 

 width of brain case, 21.5; maxillary tooth row, 22. For individual 

 measurements see table, page 151. 



Remarlcs. — Tana chrysura is a well-marked form. Its buff-colored 

 tail serves at once to distinguish it from other members of the genus. 

 In addition to the difference in color of the tail, it also differs in its 

 general color from T. tana. This to my mind shows it to be no 

 mere color phase of T. tana, but a perfectly distinct species. This 

 view is further advanced by the fact that Tana chrysura has not yet 

 been secured in Borneo other than in the vicinity of the type-locality, 

 and that no specimens of T. tana have been taken at the type- 

 locality of T. chrysura. Its analogy with Tupaia demissa, page 58, 

 is interesting. 



Specimen examined. — Seven, all from the vicinity of the type- 

 locality. 



TANA PAITANA, new species. 



Type-locality. — Paitan Kiver, northeastern Borneo. 



Type-specimen. — In British Museum, Reg. No. 93.4.1.1, skin and 

 skull of adult, collected along the Paitan River, northeastern Borneo, 

 July, 1892, by A. Everett; in good condition, but skull somewhat 

 damaged posteriorly. 



Geographic distribution. — Known only with certainty from the type- 

 locality, but represented on Banguey Island by the same or a closely , 

 allied form. See No. 2 on map on page 143. 



Diagnosis. — Differs conspicuously from Tana tana in the greater 

 development of yellowish gray liglit areas on either side of the dorsal 

 line so as to embrace the area of the shoulder stripe, instead of having 

 it embraced by the reddish brown color of the sides. Mammas un- 

 known. 



Color. — Much brighter and "redder" than is Tana tana on the sides, 

 legs, and lower back; the lower back without any evident black patch 

 and nearly as clear ferruginous as are the sides; the Hght areas on 

 anterior half of back more extensive and hghter than in any other 

 form, with the general effect of a yellowish gray instead of the rather 

 clear gray seen in Tana tana utara, the light shoulder stripe being 

 entirely surrounded by this yellow gray area, and not bordered above 

 and below by a forward extension of the ferruginous color of the 

 sides, underparts not essentially different from those of Tana tana. 



SJcull and teeth. — These show no special distinguishing features and 

 are apparently indistinguishable from those of Tana tana. 



