54 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



upper incisor is larger and in the permanent dentition shows a dis- 

 tinct trace of a'fourth cusp. 



Measurements. — External measurements of type : total length, 

 640; head and body, 385; tail vertebras, 235; hind foot, 65 (59) ; 

 front foot, 78 (71) ; ear from meatus, 18; ear from crown, 16; width 

 of ear, 13. External measurements of immature male (No. 

 114,376) : total length, 550; head and body, 335 ; tail vertebrae, 215 ;, 

 hind foot, 62, (57) ; front foot, 68 (61). 



Cranial measurements of type : greatest length, 69 ; basal length, 

 65.4 ; basilar length, 61 ; lateral palatal length, 32 ; palatal width at 

 front of first incisor, 13 ; palatal width at space between canine and 

 first premolar, 20.4 ; distance between inner edge of posterior molars 

 (alveoli), 16; least distance from orbit to anterior nares, 24.2 ; zygo- 

 matic breadth, 41 ; greatest orbital breadth, 45 ; least interorbital 

 breadth, 19.4; breadth of braincase above roots of zygomata, 24," 

 mastoid breadth, 28.6; greatest depth of braincase, 19; occipital 

 depth, 15; mandible, 49; depth of mandible between canine and first 

 premolar, 6.6; depth of mandible through coronoid process, 21; 

 maxillary toothrow (alveoli), 33; mandibular toothrow (alveoli), 



33-6- 



Cranial measurements of immature male (No. 114,376) from the 

 type locality : greatest length, 66 ; basal length, 63 ; basilar length, 

 58 ; lateral palatal length, 30.6 ; palatal width at space between canine 

 and first premolar, 19.6; zygomatic breadth, 39; mandible, 48.4; 

 maxillary toothrow (alveoli), 30.6; mandibular toothrow (alveoli), 



32.4- 



Specimens examined. — Two, both from Pulo Tuangku. 



TUPAIA CASTANEA sp. nov. 



Type. — Adult female (skin and skull). No. 115,608, United States 

 National Museum. Collected on Pulo Bintang, Rhio Archipelago, 

 August II, 1902, by Dr. W. L. Abbott. Original number, 1872. 



Characters. — Similar to Tnpaia splendidula but larger and darker ; 

 underparts clear tawny-ochraceous. 



Color. — Upperparts a fine, close mixture of black and ferruginous, 

 the general effect slightly more red than the chestnut of Ridgway, 

 though in certain lights appearing almost black. The hairs are 

 everywhere very glossy. On occiput and forehead the chestnut 

 fades rather abruptly into the light grizzled brown of face and 

 cheeks. The pale element of this grizzle is ochraceous-bufif, the 

 dark element an indefinite blackish brown. The former is a little 

 in excess. Outer surface of hind legs like back, outer surface of 



