no.1751. SOME NEW SPECIES OF MONKEYS ELLIOT. 351 



length of nasals, 31; length of upper molar series, 32; length of 



mandible, 97.1; length of lower molar scries. 40.1. 



The example described lias a very worn coat and hairs thinly 

 dispersed on limbs and under parts. While the coloring is dis- 

 similar to P. fasdcularis, the great difference between that species 

 and the Trong macaque is in the size and shape of the skull and 

 teeth. The skull of the Snmatran species, although the animal was 

 about of the same age, is one-third smaller. The Trong skull has a 

 low crest from the midfrontal to the occiput; the rostrum is longer 

 and broader; zygomatic width greater; nasals wider; bony palate 

 deeper and longer; teeth larger; incisors more than twice as large; 

 mandible longer ami heavier, the ascending ramus broader and 

 longer with a very slight inclination backward. A single specimen, 

 a male, from Telibon Island has a different skull, is much smaller and 

 a somewhat different color, and may eventually prove distinct, but 

 at present I leave it under the name of the Trong macaque. 



Genus PYGATHRIX. 

 PYGATHRIX ULTIMA, new species. 



Tijpe-locality. — Mount Dulit, Borneo. :!,()()() feet elevation. 



Type.— Cat. Xo. 83949, U. S. X. M. Collected by E. and C. Hose. 



General characteristics. — Similar in color to P. cristatus, but cranial 

 characters very different. The skull compared with that of P. cris- 

 tatus, two adult males, is generally larger; rostrum and brain case 

 longer and narrower; septum broader, tooth row almost straight; 

 teeth larger and tooth rows longer; pterygoidfossa longer and ptery- 

 goids not so widely flaring; bullae much less inflated; in fact com- 

 pressed and reduced; palate longer and narrower; the lower edge of 

 mandibular angle much more rounded, and the lateral pit in tin 1 

 ascending ramus shallower and smaller. - 



Color. — Like P. cristatus, but averaging slightly darker. 



Measurements. — Total length, 1,370 mm.; tail, 820 (skin): skull, 

 total length, 104.2; occipito-nasal length, 87; hensel, 7")..'!; zygo- 

 matic width, 77; intertemporal width, 42.5; palatal length, 38.9; 

 width, 19.4; median length of nasals, 15. 1; length of upper molar 

 -ciics, ;!!»; length of mandible, 7."). 7: length of lower molar series. 

 36.5. 



PYGATHRIX SANCTORUM, new species. 



Type-locality. St. Matthew Island. Mergui Archipelago. 



Type. Cat. No. 104446, Q.S.N.M. 



<i(iitr<il characteristics. Similar in color to P. obscura carbo from 

 Terutau and Lankawi islands, St raits of Malacca, but cranial characters 

 (piite different. Teeth large: tooth rows, rostrum and palate longer; 

 palatal arch pointed, reaching nearly to posterior edge of second molar; 

 pterygoids much larger and widely spaced; pterygoid fossa con- 



