132 MILLER 



eye ring blackish. Cheeks and short median stripe on forehead dull 

 whitish gray. Under parts essentially like back, but buff tinge more 

 diffuse. Feet and ears dark brown. Tail like back but darken- 

 ing to uniform brown beyond middle. 



Newly born young are clear bluish gray, with scarcely a tinge of 

 buff. The three black dorsal stripes are clearly defined and normal in 

 extent. 



Skull. — In addition to its smaller size the skull differs from that of 

 the Bornean Arctogalidia stigmatica in the relatively larger brain- 

 case, and less prominent audital bullae. The braincase is nearly as 

 broad as in the Bornean species, but the zygomatic width is distinctly 

 less. Audital bullae less raised above level of basi-occipital when skull 

 is held upside down and viewed from behind. The sagittal crest, 

 though of normal development in very old individuals, is absent at an 

 age when it is well grown in the larger species. In Arctogalidia leucotis 

 and A. stigmatica^ even in animals so young that the teeth are un- 

 worn and all the sutures of the rostrum plainly visible, the sagittal 

 crest is a knife-like ridge extending from proencephalon to lambdoid 

 suture, and rising to a height of about 4 mm. over middle of brain- 

 case. In much older individuals of A. inorjtata^ with worn teeth and 

 nearly obliterated rostral sutures, the crest is represented by a low 

 ridge about 5 mm. wide over middle of braincase and flat or grooved 

 on top. At this stage it rises very inconspicuously above level of the 

 adjacent surface, from which it is distinguished more by the texture of 

 the bone than by actual form. 



Teeth. — The teeth are uniformly inuch smaller than in Arctogalidia 

 leucotis and A. stigmatica.^ but I can detect no important differences 

 in form. 



Measurements. — External measurements of type : total length 

 1027 ; head and body 469 ; tail vertebrae 558 ; hind foot 78 (73.) Ex- 

 ternal measurements of an adult female: total length 911 ; head and 

 body 431 ; tail vertebras 480; hind foot 77 (72). 



Cranial measurements of type: greatest length 102 (115);^ basal 

 length 96 (io6) ; basilar length 92 (103) ; median palatal length 53 

 (60) ; palatal breadth between anterior molars 13 (15.4) ; zygomatic 

 breadth 55 (60) ; breadth between tips of postorbital processes 41 

 (39) ; constriction in front of postorbital processes 19 (18) ; constriction 

 behind postorbital processes 13 (12) ; breadth of braincase above 

 roots of zygomata 32 (33) ; mastoid breadth 36 (38) ; mandible 76 



^Measurements in pa:-entheses are those of a young adult A. stigmatica from 

 British North Borneo. 



