THE SKELETON IN THE PLYING LEMURS. 



Skulls of Malayan species. United States National Museum — Continued. 



207 



U. S. Nat. 



Mus. 

 number. 



Original 

 number. 



Name. 



Locality, 



Sex, age, etc. 



Collector. 



3785 

 3946 

 3781 

 3945 

 122766 



115493 

 122888 

 49693 

 86786 

 84420 

 84421 

 86787 

 83276 

 l.'il8S7 



1 



Galeopithecus 

 volans. 



_ao 



Singapore. Ma- 

 lay Peninsula, 

 do 



Not given 



.do 



Explor. Exped. 

 Do. 



W. L. Abbott. Pa- 

 rietals dented, 

 killed with 

 blow. 



W. L. Abbott, 

 July, 1902. 



W, L. Abbott, 

 July, 1903. 



W. L. Abbott, 1903. 



W. L. Abbott, 1S99. 



W. L. Abbott, 



Mar. 5, 1897, 

 W, L. Abbott, 



Mar. 4, 1897. 

 W. L. Abbott, 



Mar. 4,1899. 

 W. L. Abbott, 



Mar. 1,1896. 

 W.L.Abbott, 1897. 



J 



Oaleopithecus sp..'. 



Malay Peninsula, 

 Pinic. 



Rnmpin R,. Pa- 

 hang, 



E, Sumatra, Pulo 

 Kundur, 



E, Sumatra, Pulo 

 Kundur, 



Trong, Lower 

 Siam, 

 .do - 



do 



■ 1838 

 2521 



Galeopithecus 



9 adult; mand- 

 ible broken. 

 ? adult; perfect,. 



. _ do 





do 





do 



do- 





do 



do 



9 young; some- 

 what broken. 



Sex not given; 

 young. 



d' subadult 





do 



do 





.... do 



._ .do 



5701 



GaleopiHiecns sp.t. 



Pulo Sebuku 









Skull. — Taking the series as a whole (Malayan and Philippines) and 

 viewing the skull from above there are a number of points of difference 

 worthy of notice, and these apart from the matters of sex and age. 

 On this view any Philippine Islands specimen can be distinguished at 

 once from any of the Malayan forms by the character of the naso- 

 maxiUai7 arch, taken transversely from alveolar process of one side to 

 the one on the opposite side and including all the region anterior to 

 the orbits. In the Philippine forms this is very broad and rounded ; the 

 nasals more or less lying in the same surface; while on transverse 

 section here the line of the curve is circular. In the Malayan forms this 

 region is narrower; as a rule, more acute, and the nasals more in evi- 

 dence, and raised above the general surface for their entire lengths. 

 In old individuals these bones in all forms (Malayan and Philippines) 

 fuse eompletel}' with the bones they articulate with in the face. 



In the Malayan forms the superior produced arches of the orbital 

 peripheries are more elevated and, as a rule, much broader than they 

 are in any of the Philippine forms. In all species, the orbital cavity 

 is strikingly circular in outline, with the plane of its margin looking 

 forward, outward, and slightly upward; its cavity, everything else being 

 equal, being markedly greater in the Malayan species than it is in anv 



