142 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 40. 



Measurements of proboscis monkeys. 



Locality 



Sempang River 



Do 



Do 



Kendawangen River. 

 Pangkalahan River. . 



Do 



PamukangBay 



Balik Papan Bay 



Do 



Cata- 

 logue 

 No. 



145323 

 145324 

 145325 

 153802 

 151816 

 151817 

 151818 

 154374 

 154375 



Sex. 



Male 



..do 



Females 



Male 



Female . 

 ..do.... 



Male 



..do 



Female . 



Age. 



Young adult.. 

 Adult 



old ;; 



Young adult.. 



Adult 



....do 



....do 



Young adult.. 

 ....do 



mm 

 710 



715 



51 ill 



mm. 

 230 

 230 

 182 



kgs. 

 22.0 

 19.0 

 9.5 



8.6 



19.0 

 9.0 



in m. 

 93.7 

 93.8 

 72.9 

 94.5 

 71.3 

 60.9 

 95.9 

 93.9 

 71.0 



mm. 

 91.8 

 93.9 

 73.3 

 91.7 

 72.3 

 72.3 

 90.4 

 93.9 

 73.5 



■3S 



mm. 

 40.6 

 39.3 

 33.9 

 44.0 

 31.7 

 33.6 

 39.7 

 41.8 

 36.2 



1 Collector's measurements. 



2 Collector's measurements in pounds changed to kilograms. 



3 Fetus in uterus. 



HYLOBATES LEUCISCUS (Schreber). 



1907. Hylobates leuciscus, Lyon, Proc. U. S. Nat. Mus., vol. 33, p. 570, December 

 24, 1907. 



Seven specimens from the Landak and Kapuas rivers, collected in 

 1905. 



HYLOBATES MULLERI Martin. 



1841. Hylobates mulleri Martin, Nat. Hist. Mamm. Anim. 

 "meridional parts of [Borneo]." 



p. 444. Type-locality, 



Twenty-three specimens of Hylobates mulleri were collected by 

 Doctor Abbott in southwestern and southeastern Borneo. They are 

 strikingly different in coloration from Hylobates leuciscus of the 

 Kapuas River region. All of them have the crowns of the head and 

 the hands and feet distinctly darker in color than the rest of the 

 animal. I have been unable to find any tangible differences between 

 the skulls of the two species, although they show many and marked 

 individual variations. These gibbons from southern Borneo are sep- 

 arable into two geographic races, H. mulleri mulleri, from southeastern 

 Borneo, and a new form described below. The type-locality of 

 Martin's H. mulleri is simply southern Borneo. As the gibbons col- 

 lected by Doctor Abbott in southeastern Borneo agree with Martin's 

 description, especially as to the light-colored superciliary stripe not 

 being continued down on to the face as light whiskers. The type- 

 locality of H. mulleri may be restricted to southeastern Borneo. 

 Generally common.— W. L. A. 



HYLOBATES MULLERI ALBIBARBIS, new subspecies. 



Type.— Skin and skull of adult male, Cat. No. 145327, U.S.N.M 

 collected along the Matan River, a tributary to the Sempang, August 

 16, 1907, by Dr. W. L. Abbott. Original number, 5501. 



