224 MILLER 



head and body 191 ; tail vertebrje 178 ; pencil 70; hind foot 44 (40.4). 

 Average of five specimens from the type locality: total length 367 

 (355-375); head and body 194 (1S4-310); tail vertebrae 176 (171- 

 17S); hind foot 46.6 (44-49); hind foot without claws 43.6 (42- 

 45.4). Average of five specimens from Pulo Jimaja, Anambas : 

 total length 368 (356-381) ; head and body 199 (197-203) ; tail verte- 

 brae 169 (165-178) ; hindfoot 47.1 (45-48) ; hind foot without claws 

 44 (42-45). An adult female from Pulo Mata, Anambas: total 

 length 368; head and body 203; tail vertebriE 165; hind foot 48 

 (44). An adult male from Pulo Riabu, Anambas: total length 362 ; 

 head and body 191 ; tail vertebrae 171 ; hind foot 47 (43.6). 



Cranial measurements of type : greatest length 49.6; basal length 

 41.4; basilar length 39 ; palatal length 21.4 ; diastema 1 1 ; length of 

 nasals 14.4; breadth of nasals anteriorly 7; breadth of nasals pos- 

 teriorly 4.2; interorbital breadth 17.4; breadth between tips of post- 

 orbital processes 26 ; zygomatic breadth 29 ; mastoid breadth 20 ; 

 breadth of palate between premolars 6.2 ; depth of rostrum at posterior 

 extremity of nasals 1 1 ; mandible 29 ; depth of mandible at posterior 

 root of large premolar 7; maxillary toothrow (alveoli) 9; breadth 

 across both upj^er incisors at rim of alveoli 4 ; mandibular toothrow 

 (alveoli) 9. 



Specime?is examined. — Fifteen, from the following islands of the 

 Anambas group : Pulo Siantan, 6 ; Pulo Jimaja, 6 ; Pulo Mata, 2 ; 

 Pulo Riabu, i. 



Remarks. — The plantain squirrel of the Anambas Islands is readily 

 distinguishable from other members of the Sciurus notatus group, 

 though no one of its characters alone is very striking. Specimens 

 from the different islands agree closely with each other, the one from 

 Pulo Riabu excepted. This differs from the others in a marked re- 

 duction in the size of the audital bullae, in this respect approaching 

 the Tambelan species. In other respects this specimen is typical. 



SCIURUS ABBOTTII sp. nov. 



Type. — Adult female (skin and skull). No. 101662 United States 

 National Museum. From Big Tambelan Island. Collected August 

 10, 1899. 



Characters. — vSimilar to Sciurus a7ia7}ibensis but skull with more 

 slender rostrum and smaller, less inflated audital bullaj. 



Color. — The color of Sciicr?is abbottii agrees so closely with that of 

 S. anambcnsis that no detailed description is necessary. In many of 

 the specimens there is a distinct sprinkling of grayish hairs in tawny 

 of underparts, especially in region bordering the dark lateral stripe. 



