450 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



usuallv from 2 to 4 mm. behind that of nasals (see Plate XIX). The 

 bony palate in R. Ixnata is narrower relatively to its length than 

 in E. imlliata, and the anterior extension of the maxillaries which 

 rnns forward between the posterior extremities of the premaxillaries 

 to form hinder margin of incisive foramina is very noticeably nar- 

 rower (see Plate XIX). In most of the skulls the anterior extremity 

 of the interpterygoid space is narrower than in the related species, 

 but their character is not wholly constant. 



Teeth as in Ratufa ])alliata. 



MenmremeriU.—^^i^^x^^ measurements of type: Total length, 740; 

 head and body, 330; tail vertebrjB, 410; hind foot, 76 (68). Average 

 of eleven adults from the type locality: Total length, 732 (710-765); 

 head and Iwdy, 334 (325-345); tail vertebra, 398 (380-420); hind foot, 

 75.8 (73-79); hind foot without claws, 68.7(65-71). For details see 



table, page 450. 



Cranial measurements of type: Greatest length, 68.6 (68); « basal 

 length, 56.8 (57); basilar length, 52 (53); length of nasals, 22 (21); 

 least interorbital breadth, 27 (29); zygomatic breadth, 41 (42); man- 

 dible, 43.4 (42); maxillary molar series (alveoli), 13 (12.8); mandibular 

 mohir series (alveoli), 13.6 (13.8). 



Specimens examined. — Twelve, al] from the type locality. 



Remarks.— "Wi^ charactei-s which distinguish this squirrel from its 

 nearest ally are of an unusual kind, but their constancy is such that 

 they must be regarded as valid. Three skulls of adult Ratufa palliata 

 have been compared with the twelve of R. Isenata. 



Measurements of Ratufa. 



Name. 



Locality. 



Total 

 length. 



Head 

 and 

 body. 



Hind 

 foot. 



Hind 

 foot 



with- 

 out 



claw.s. 



Ratufa nigrescens. . . 



Do 



Do 



Do 



Do 



Ratujajemoralis 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Ratufa Iwnata. 

 Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Raliifdpalliata. 

 Do 



PuloMansalar.. 



....do 



....do 



....do 



....do 



PuloTuangku.. 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



do 



do 



do 



do 



do 



do 



do 



do 



do , 



Tapanuli Bay . 

 Did ragiri River 



114554 

 114565 

 114556 

 114557 

 11455S 

 114358 

 114359 

 114365 

 114360 



n 114361 

 114362 

 114363 

 114364 

 114346 

 114348 



a 114350 

 114352 

 114353 

 114356 

 114354 

 114357 

 114347 

 114349 

 114351 

 114355 

 114517 



"113162 



Female adult. 



....do 



....do 



....do 



....do 



Male adult ... 



do 



do 



Female adult. 



do.., 



.....do 



do 



do 



Male adult ... 



do 



do 



.....do 



do 



do 



do 



do 



Female adult. 



do 



do 



do 



Female young 

 Male adult 



mm. 

 730 

 750 

 750 

 705 

 705 

 710 

 710 

 685 

 715 

 690 

 680 

 670 

 740 

 720 

 720 

 740 

 755 

 685 

 735 

 710 

 725 

 730 

 730 

 765 

 720 

 640 

 770 



vim. 

 320 

 340 

 340 

 320 

 340 

 325 

 325 

 310 

 325 

 320 

 320 

 310 

 335 

 335 

 330 

 330 

 338 

 315 

 345 

 340 

 325 

 330 

 330 

 345 

 330 

 270 

 345 



mm. 

 410 

 410 

 410 

 385 

 365 

 385 

 385 

 375 

 390 

 370 

 360 

 360 

 405 

 385 

 390 

 410 

 417 

 370 

 390 

 380 

 400 

 400 

 400 

 420 

 390 

 370 

 425 



mm. 



a Type. 



"Measurements in parentheses are those of the type of Ratufa palliata. 



