186 Hollistei — A New Philippine Flying-Squirrel. 



rostrum; interorbital breadth less; all teeth slightly larger; zygomata 

 lighter; and bullae slightly less flattened (but still very broad and low 

 and not inflated to anywhere near that degree found in species of the 

 other subgenera). Mastoids not inflated. Small premolar robust, and 

 other cheek teeth slightly increasing in size backward; crowns low; 

 enamel finely sculptured; ridges low, with transverse ridges somewhat 

 broken, the supplementary cusps between them small, but plainly visible 

 on pm 4 , and less on m 1 ; obsolete on m 2 . 



Measurements of type. — Total length, -570 mm. ; tail, 260; hind foot, 42. 

 Ear from notch (relaxed on dry skin), 13.5; length of ear tufts, 36. 

 Skull.— Greatest length, 53; condylobasal length, 48.6; basal length, 

 45.1; zygomatic breadth, 32; least interorbital breadth, 10.1; greatest 

 breadth of nasals, 9.2; mastoid breadth, 22; length of maxillary tooth 

 row (alveoli), 11.6; length of mandible from anterior surface of symphy- 

 sis to condyle, 32.5. 



Remarks. — It is interesting that this second known Philippine flying- 

 squirrel belongs to a different subgenus from the Palawan species, S. 

 nigripes. Though the subgeneric characters in »S'. crinitus are less pro- 

 nounced than in some other species, there seems no question as to its place 

 in Petinomys. 



