16 GYLDENSTOLPE, ON A COLLECTION OF MAMMALS MADE IN EASTERN AND CENTRAL BORNEO. 



On the skull the crest is high in front and descends abruptly towards the postnasal 

 depression. P 2 is placed in rovv with the other teeth as well as p 3 . 



Skull measuremenls : Greatest length of skull: 22,6; mastoid width: 10. 4; greatest 

 width of braincase: 9,6; zygomatic width: 11,7; maxillar width: 7,8; width of nasal 

 swellings: 5,6; least interorbital width: 2,4; length of upper toothrow: 8,5; length of 

 lower toothrow: 9,2; occipitonasal length: 19,6 mm.; supraorbital length (viz. from 

 posterior point of postnasal depression to median anterior point of nasals) : 8,0; man- 

 dible (condylus to front of incisors): 15,3 mm. 



10. Galeopterus borneanus Lyon. 



Proc. U. S. Nat. Mus., vol. 40, 1911, p. 124. 



No. 59. $ Camp 6, Eastern Borneo u /i 1914 (2,000 feet). Head and body: 358 mm. Tail: 248 

 mm. Hindfoot: 67 mm. Ear: 23 mm. Iris: burnt umber. 



The speeimen of Flying Lemur collected at Camp 6, Eastern Borneo, probably 

 belongs to the species described by Lyon under the name of G. borneanus. The 

 type of this form was collected by Dr. W. L. Abbott at Tjantung in South Eastern 

 Borneo. 



As compared with the skulls of G. lechei sp. n. as described below, that of 

 borneanus may at a glance be distinguished by its larger molars which are of about 



Textfig. 3- Galeopterus borneanus Lyon. $ Camp 6, Ea3tern Borneo (2,000 feet). '/» nat. size. 



the same size as those of G. temminckii from Sumatra. The nasals are pinched up 

 into a distinct ridge as in temminckii, variegatus from Java and peninsulce from the 

 Malay Peninsula. The distance between the bullas (basioccipital width) is less in 

 borneanus than in any of the other related forms. The speeimen obtained is in its 

 grey phase and agrees fairly well with the original description. 



Skull measuremenls: Greatest length of skull: 64,9; condylobasal length of skull: 

 63,o ; basicranial length of skull: 58,6; occipitonasal length: 61.3; zygomatic width: 

 38.9; greatest width of braincase: 25,6; least interorbital breadth: 15,o; least postor- 

 bital breadth: 20,9; greatest orbital breadth: 40,7; depth of zygomata: 3,4; lateral 





