238 PITHECUS 



In general appearance this Macaque is totally unlike P. sirhas- 

 SENENSis, and while the skulls of the two forms have a general resem- 

 blance to each other, the present species has a narrower braincase, 

 longer tooth rows, and smaller incisors, these being intermediate 

 between the species just named and P. lautensis. One specimen only 

 was obtained by Dr. Abbott. 



PiTHECUS LAUTENSIS Elliot. 



Pithecus lautensis Elliot, Proc. U. S. Nat. Mus., XXXVIII, 1910, 

 p. 345. 



LAUT ISLAND MACAQUE. 



Type locality. Pulo Laut, Natuna Islands. Type in United 

 States National Museum. 



Genl. Char. Resembling P. lingungensis but not so red; skull 

 entirely different. 



Color. Top of head and upper parts tawny ochraceous and brown- 

 ish black ; arms and hands bluish gray ; hairs tipped with cream buff ; 

 outer side of thighs unicolor to back, legs olive gray ; feet darker, 

 being brownish gray ; under parts and inner side of limbs, silvery gray; 

 tail above blackish brown becoming gradually paler towards tip, 

 beneath whitish gray. Ex type United States National Museum. 



Measurements. Total length, 1,018; tail, 548. Skull : total length, 

 112.2; occipito-nasal length, 95.3; Hensel, 80.7; intertemporal width, 

 39.8; zygomatic width, 82.7; palatal length, 45.7; breadth of brain- 

 case, 54.5 ; median length of nasals, 27.1 ; length of upper molar series, 

 27.1 ; length of mandible, 84.1 ; length of lower molar series, 36.1. Ex 

 type United States National Museum. 



This Macaque is very similar in color on body and head to P. 

 LINGUNGENSIS, but is Very different in the color of the limbs, arms 

 particularly. The main differences are to be found in the skull. This 

 has a very broad face, and space across orbits very wide ; orbital ridge 

 much heavier ; the braincase is larger in every way, and the root of the 

 zygomata broader and heavier ; palate is wider ; basioccipital and basi- 

 sphenoid broader and longer, and the zygomatic arch more widely 

 spread ; the outer edge of the occipital region in P. lingungensis is 

 rounded, but pyramidal without the cap in the present species ; incisors 

 smaller. 



Altogether the two skulls are as different in all respects as two 

 crania can well be of species belonging to the same genus. One 

 example obtained by Dr. Abbott. 



