no. 1809. MAMMALS FROM BORNEO AND VICINITY— LYON. 125 



Specimens examined. — Two, the type and nearly adult male from 

 the Sempang River. 



Remarks. — I quite agree with Thomas * that there is a resemblance 

 between the flying lemurs of Borneo, the Natunas, and the Malay 

 Peninsula. It is not plausible to suppose that they represent a single 

 species, nor does the rather limited material at hand show this to be 

 the case. Even Thomas himself has recently named the Penin- 

 sular form. Galeopterus .borneanus can not be considered a strik- 

 ingly distinct species. It is certainly very distinct from G. aoris 

 Miller. I can see very little wisdom in Thomas and Wroughton's 

 combining the Aor, Rhio Archipelago, Natuna, and Bornean Gal- 

 eopterus under the name aoris. 2 The only real way to settle the case 

 is to get together good series, but meanwhile it seems best to recog- 

 nize the described forms. Flying lemurs ought to be subject to as 

 much geographic and insular variations as are other groups of mam- 

 mals. 



GALEOPTERUS LAUTENSIS, new species. 



Type.— Skin and skull of adult female, Cat. No. 151886, U.S.N.M., 

 collected on Pulo Laut off southeastern Borneo, December 23, 1907. 

 Original number, 5679. 



Diagnostic characters. — A medium-sized member of the genus 

 closely related to the Bornean animal, but slightly larger, with a dis- 

 tinctly longer tooth row and with the mastoids considerably shrunken. 



Color. — The color is essentially like that of the Bornean animal 

 described above, but the white spotting occurs frequently in larger 

 splotches, and there is more ochraceous in the color of the back. 



Skull and teeth. — The skull and teeth of Galeopterus lautensis closely 

 resemble those of the nearby Bornean animal. The skull is slightly 

 larger, more angular, with a narrower brain-case, and less prominent 

 mastoids. The tooth row is considerably longer. 



Measurements. — See table, page 126. 



Specimens examined. — Three; the type, a young one taken with 

 her, and a male from the island of Sebuku. 



Remarks. — The male from the island of Sebuku is only provisionally 

 referred to G. lautensis. It has about the size and general appear- 

 ance as if it might be the male of that species. Unfortunately there 

 is no material with which to make a satisfactory comparison. 



Regarding the type-specimen, Doctor Abbott writes: 



This animal has a somewhat interesting history. It was seized by a small forest 

 eagle (Spiza'etus limna'etus) and the two fell to the ground and were seized by some 

 Malays who observed the occurrence. The place was in a small clearing on the east 

 side of Pulo Laut. There were some gigantic trees standing on the edge of the clearing. 

 The " kubong " was on one of these trees when the hawk grabbed her. She was carry- 

 ing a newborn young one. There was an old wound full of maggots upon one shoulder, 



i Ann. Mag. Nat. Hist., ser. 8, vol. 1, p. 254, March, 1908. 

 2 Journ. Fed. Malay States Museum, vol. 4, p. Ill, 1909. 



