152 PROCEEDINOS OF THE NATIONAL MUSEUM. vol.45. 



TANA DORSALIS (Schlegel). 



1857. Tnpaja dorsaUs Schlegel, Handl. Beoef. Dierk., p. 59, pi. 3, fig. 31, two- 

 fifths nat. size, in black and white, 1857. 

 1890. Typaia dorsalis, Jentink, Notes Leyden Museum, vol. 12, p. 228, 1890. 



Type-locality. — ^Lower Kapuas Kiver, western Borneo.^ 



Type-specimens. — Cotypes in Leyden Museum,^ mounted skins "&" 

 and "^f," under Tupaja tana of Jentink's Catalogues, of which they 

 are there considered young examples, and skull "/" under T. tana. 

 Skin "gr" was collected b}^ M. Schwaner in Borneo, along the Kapuas 

 River. I have not seen these cotypes. 



Geograpliic distribution. — Known from western and northern 

 Borneo, but probably occurring elsewhere in the island. See No. 12 

 on map on page 143. 



Diagnosis. — ^A very well-marked species of the genus Tana char- 

 acterized by its small size, short claws, narrow dorsal stripe extending 

 from nape almost to base of tail. Mammae 2-2 = 4. 



Color. — Upper parts and sides of anterior parts of body, "svith the 

 general effect of olive, produced by a fine grizzling of blackish and 

 buffy, upper parts and sides of posterior parts of body, with the 

 general effect of burnt umber, produced by a fine grizzling of blackish 

 and tawny. The line of demarcation between the two colors is not 

 sharp, but they gradually blend one with the other; the olive color in 

 most specimens occupies more than the anterior half of body, but in 

 some tile olive and burnt umber are about equally divided. Extend- 

 ing through the middle of both colors from the nape almost to the 

 root of tail is the narrow (2-3 mm.) black dorsal line, shghtly wider 

 at the middle than at the ends. Top and sides of head, intermediate 

 in color between the olive of the anterior parts of body and the burnt 

 umber wash of the posterior parts. Outer side of hind legs similar 

 to adjacent parts of body; outer side of fore legs intermediate in color 

 between the head and the anterior parts of body. Tail above the 

 5ame color as the lower back, at base, becoming dark brownish 

 toward the end; underside of tail similar to the color above for the 

 outer haK of hairs, russet for the inner half of hau's ; underparts, includ- 

 ing innerside of legs, dull buffy to ochraceous buff, clearest in the 

 region of the throat, elsewhere obscured by the slaty bases of the 

 hairs showing through; shoulder stripe fairly conspicuous, cream 

 buff or buff. (Plate 6, fig. 2.) 



Sl'ull and teeth.— The skull of Tana dorsalis is mainly distinguished 

 by its smaller size, but the rostrum is relatively less slender and 

 attenuate. The difference in size between Tana dorsalis and the 

 smallest member of the tana group, T. lingx, is not greater than 



» See Jentink, Notes Leyden Museum, vol. 12, 1890, p. 228, and also Cat. Syst. Mamm. Mus. Hist. Nat. 

 Pays-Bas, vol. 12, 1888, p. 116. 



2 See Jentink, Notes Leyden Museum, vol. 12, 1890, p. 228, and also Cat. Ost. Mamm. Mus. Hist. Nat. 

 Pays-Bas, vol. 9, 1887, p. 240. 



