50 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



lateral palatal length, 29.6 ; palatal width at space between canine 

 and first premolar, 19.6; zygomatic breadth, 37; depth of zygoma, 

 5; mandible, 44.8; maxillary toothrow (alveoli), 30.6; mandibular 

 toothrow (alveoli), 31. 



Specimens examined. — Two, both from Sirhassen Island. 



GALEOPITHECUS NATUN^ sp. nov. 



1901. Galeopitliccus volans Miller, Proc. Washington Acad. Sci., in, 

 p. 134, March 26, 1901. Part, specimen from Bunguran Island. 

 Not Lemur z^o /an j Linnaeus. 



Type. — Adult female (skin and skull). No. 104,602, United States 

 National Museum. Collected on Bunguran Island, North Natunas, 

 July 16, 1900, by Dr. W. L. Abbott. Original number, 573. 



Characters. — Intermediate in size between the large and small 

 members of the genus. Skull and teeth essentially as in Galeo- 

 pitheciis volans but distinctly smaller. Color as in the related species. 



Color. — The color shows no tangible differences from that of the 

 species just described. The specimen is in the gray phase. 



Skull and teeth. — The skull and teeth are very similar to those of 

 Galeopithccus volans from the Malay Peninsula, but are readily dis- 

 tinguishable by their smaller size. In the type the lachrymal region 

 is considerably swollen so that the rostrum is less sharply marked 

 off from the orbit than in Galeopithccus Z'olaiis, a. character which 

 may prove to be individual. Palate slightly narrower than that of 

 Galeopithccus volans, but not closely approaching the form charac- 

 teristic of the Sirhassen animal. The teeth show no tangible pecu- 

 liarities. 



Measurements. — External measurements of type: total length, 

 660 ; head and body, 405 ; tail vertebras, 255 ; hind foot, 70 (64) ; front 

 foot, 83 {yj) ; ear from meatus, 17; ear from crown, 16; width of 

 ear, 12.6. 



Cranial measurements of type : greatest length, 71 ; basal length, 

 67.6 ; basilar length, 63 ; lateral palatal length, 33 ; palatal width at 

 front of first incisor, 14 ; palatal width at space between canine and 

 first premolar, 22 ; distance between inner edge of posterior molars 

 (alveoli), 14.8; least distance from orbit to anterior nares, 26.4; 

 zygomatic breadth, 41.8; depth of zygoma, 5.4; greatest orbital 

 breadth, 44.4; least interorbital breadth, 17.6; breadth of braincase 

 above roots of zygomata, 25.4 ; mastoid breadth, 33.6 ; greatest depth 

 of braincase, 19; occipital depth, 15.4; mandible, 51; depth of 

 mandible between canine and first premolar, 6.8 ; depth of mandible 

 through coronoid process, 22.6 ; maxillary toothrow (alveoli), 34.6; 

 mandibular toothrow (alveoli), 36. 



