ON MAMMALS FROM BILI.ITON. 151 



skull 27 



nasals 7 



greatest breadth 17 



palate 11.5 



diastema 5.5 



length of upper molar series 5.5 



Very characteristic in the skull is the enormous deve- 

 lopment of the tympanic bullae (plate 7, fig. 14): they 

 are much broader and flatter than in any other species , 

 nay than in Sc. pearsonii (plate 7 , fig. 4). 



Incisors are lighter colored than in any other species of 

 the group. 



I connect with this species the name of Dr. Vorderman , 

 in order to show him our gratitude. 



Sciurus albiceps Desmarest. 



Three adult specimens, dried skins. They belong to the 

 true albiceps-tjpe. In one of the specimens the tail pre- 

 sents some very curious peculiarities: it is much shorter 

 than normally and bears rings. In general the tail with 

 its tuft measures between 460 and 530 mm., but in the 

 specimen in consideration the tail measures only about 

 400 mm.; the hairs are very long, about 47 mm., those 

 of the tip of the tail about 90 mm. ; tip and base of tail 

 deep black , all the other hairs have small orange colored 

 tips , so that the tail seems to be alternatively ringed with 

 broad black and narrow orange colored bands. 



This species has been collected in the following locali- 

 ties : Siam, Malacca, Sumatra, Borneo and Java. Dr. An- 

 derson , who united Scmrus rubriventer with Sciurus bicolor 

 and albiceps^ stated (Yunnan Expedition , p. 220) that this 

 species (Sciurus bicolor) also was distributed over Celebes 

 and the adjacent smaller islands ! That Sc. bicolor^ rubriventer 

 or albiceps live in those smaller islands is quite hypothetical 

 and not based upon a single fact nor stated by observa- 

 tions made by travellers or hunters: Sciurus rubriventer 



Notes from tlie Leyden Museum, Vol. XII. 



