8 OYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



3. Prestaytis rubicunda rubicunda Muller. 



Tijdschr. voor Natuurl."Gesch. en Physiol., vol. 5, 1838, p. 137. 



No. ii). <£ Camp (i, Eastern Borneo u /a 1914 (2,000 feet}. — No. 2i). <$ Camp 6, Easteni Borneo 

 30 /i 1914 (2,000 feet). Head and body: 553 mm. Tail: 782 min. Hindfoot: 147 mm. Ear: 39 mm. — 

 No. 48. j 1 Camp 6, Eastern Borneo 10 /3 1914 (2,000 feet). Head and body: 536 mm. Tail: 715 mm. 

 Hindfoot: 175 mm. Ear: 40 min. 



The type specimen of Muller's Semnopithecus rubicundus was collected in 

 South-eastern Borneo and to this same form the speeimens collected by Mr. Lum- 

 holtz have to be referred, though they slightly resemble the race described by Doll- 

 man from Sarawak under the name of P. r. ignita (Ann. & Mag. Nat. Hist., 8 ser., 

 vol 14, 1909, p. 204). This latter form is said to be lighter in colour than typical 

 I*, rubicunda and is lacking any blackish suffusion on the hands and feet. 



Lumholtz' speeimens have the general colour nearest »mahogan} 7 red» (Ridgway, 

 pl. 2) though lighter on the head and nearest to »burnt sienna». Underparts like the 

 head. PIndividual Jiairs of back much paler at the base than at the tip. Back of 

 hands and feet slightly tinged with black and not of the same colour as the upper 

 parts of the body as in P. r. ignita. Digits almost black but faintly intermixed with 

 rufous [buff hairs. Tail similar in colour to the lower back both above and below. 



As seen by this description Mr. Lumholtz' speeimens are somewhat intermediate 

 betvveen the typical P. r. rubicunda Mull. and P. r. ignita Dollm. 



The skull of P. r. ignita is said by Dollman to differ from that of the typical race 

 by^having a high dome-shaped forehead, presenting a marked contrast to the flat 

 skull of P. r. rubicunda in which the forehead hardly rises above the level of the 

 supraorbital ridges. Even in this respect the present series resemble P. r. ignita and 

 it seems highly possible that both forms intergrade with each other. 



Skull measurements : 



Greatest length of skull 



Condylobasal length of skull • . . . . 



Basicranial length of skull 



Oecipitonasal length 



Zygomatic width 



Greatest width of biaincase . . . . 



Least interorbital width 



Least postorbital width 



Length of palate from henseliou 



Length of upper toothrow from front of canine 



to back of last molar 



Length of upper molar series (alveoli) 



Length of lower molar series (alveoli) 



(f 



ef 



ef 



No. 49 



No. 4S 



No. 29 



97,3 



95,0 



95,1 



71,0 



71,1 



70,2 



63,4 



62,5 



60,3 



82,7 



81,8 



82,1 



69,8 



68,0 



70,6 



54,8 



50,8 



57,0 



7,8 



7,0 



7,0 



45,7 



45,0 



46,2 



29,5 



30,0 



28,1 



27,5 



28,0 



29,5 



23,1 



23,4 



23,6 



29,1 



29,2 



29,0 



