TUPAJA DORSALIS, 2'29 



my belief in the validity of Tupaja dorsalis Schlegel is 

 based. 



1 already remarked that the specimens are not yet full- 

 grown , indeed in both rami the penultimate upper premo- 

 lar of the milk- dentition still is present although pushed 

 aloft by the permanent premolar, which is very good to 

 see , meanwhile in the lower jaw the hindmost premolar 

 has not yet attained its full development. For the rest the 

 teeth and their relative position in the jaws do not mate- 

 rially differ from the same organs in Tupaja tana ; the 

 dimensions of the skull like those of the teeth are gene- 

 rally smaller than in that species; the difference in size 

 however is important enough for specific distinction, as may 

 be obvious from the following measurements in millimeters : 



T. tana. ■^) T. dorsalis. 

 Length of skull 66 48 



» » lower jaw 43 33 



Across zygomatic arches .... 30 21 



Length of bony palate 36 26 



» » nasal bones 18 



The skull of T. dorsalis has the slender elongate form 

 as the same part of T. tana, and herein greatly differs 

 from T. ferruginea , javanica and other Tupaja's. 



The fur is very soft: the moderately long fur of the 

 upperparts of the body abruptly about half way the 

 sides of the body turns in much shorter and adpressed fur 

 of the underparts. The fur of the upperparts has a rufous 

 brown tinge, browner and more or less grizzled towards 

 the anterior half of the back and fore-legs: the basal part 

 of each hair is of a dark mouse-color. From a point be- 

 tween the ears runs a very good developed deep black stripe 

 along the spine of the back to the base of the tail. The 

 shoulder-stripe is yellowish white. The hairs of the belly 

 and chest are entirely reddish white or white along the 

 middle; the sides of the belly have a more brownish red 



1) Skull c of my Catalogue osteologique. 



Notes iroaa the Leyden IMuseam, Vol. XII. 



