56 Lyon Pigmy Squirrels of Nannosciurus melanotis Group. 



Measurements. Type : Head and body, 82 (78-90) ; tail vertebrae, 63 

 (63-70) ; hind foot with claws, 22 (22-23.6). Skull of type : Greatest length, 

 24.6; basal length, 18.8; basilar length, 17.6; palatal length, 10.8 ; greatest 

 width, 15.8 (15.7-164); interorbital constriction, 10.1 ; greatest breadth of 

 braincase, 13.7 ; gnathiontooccipito-sphenoid suture, 15 (14.8-15.6) ; max 

 illary toothrow (alveoli), 3.7 ; mandible, condyle to front of symphysis, 

 13.5; mandibular toothrow (alveoli), 4. 



Specimens examined. Eight males and two females, from Klabat Bay, 

 Banka ; one male from Point Tedong, Banka. 



Remarks. None of the series show any important deviation from the 

 type specimen. Two or three individuals have the nape patch slightly 

 lighter in color than in the type, in this respect being quite similar to those 

 of the Bornean series with the dull nape patches; but the general color of 

 the body is always darker. The affinity of Nannosciurus bancanus to N. 

 borneanus instead of to N. sumatranus is curious, as Banka is separated from 

 Borneo by a wide deep channel, Karimata Strait, and from Sumatra by a 

 narrow and comparatively shallow channel. One would expect the rela 

 tionship to be the reverse. 



