Mammals from the Batu Islands. 139 



Islands, I would hesitate to separate the Tana Massa specimen 

 from Tupaia tana. 



Cynocephalus tellom's, sp. n. 



Tf/pe, — Skin and skull of adult female, no. 7. 6. 18. 2, 

 British ]\Iuseum. Kannengieter Collection, collected on 

 Piilo Telle, Batu Islands, west coast of Sumatra. 



Diagnosi'w characters. — A mediuin-sized flying-lemur, very 

 similar to Cipiocephalus tuancus (Miller) (Smithsonian 

 Miscell. Coll. xlv. p. 53, November 6, 1903) of the Banjak 

 Islands, north-west coast of Sumatra, but with the nasals 

 more pinched up inio a ridge. on tlie rostrum and with the 

 squamosal root of the zygoma deeper. 



Colour. — The colour of the type and of a paratype. Cat. 

 no. 7. G. 18. 3, Brit. Mus., differs in no essential respects 

 from that of tlying-lemurs, in the grey pelage phase, from 

 the j\Ialay Peninsula. Tiie skin of a male. Cat. no. 7. 6. 18. 4 

 Brit. Mus., is very dark and shows no essential differences in 

 colour from a paratype. Cat. no. 114376 U.S. N. M., an 

 adult male, of Cynocephalus tuancus (Miller) from the Banjak 

 Islands. A young male, Reg. no. 7. 6. 18. 5 Brit. Mas., is 

 almost uniformly cinnamon-rufous, very light on the under- 

 parts, darker about the fore limbs, antebrachial membrane, 

 and head ; the usual white flecks are found on the feet and 

 legs and a few on the back. 



Skull and teeth. — The skull and teeth of Cynocephalus 

 tellonis are very similar to those of C. tuancus, the chief 

 difference being that the new form has slightly larger teeth, 

 nasals more pinched up into a ridge on top of rostrum, 

 squamosal root of zygoma much deeper, 6-7 mm. instead of 

 4 mm. in C. tuancus. The mastoid inflation is much less in 

 the Batu animal than in the Banjak specimen. The tem- 

 poral ridges in the tliree Tello skulls are much more closely 

 approximated than they are in the single adult skull from 

 Pulo Tuaiigku, although the latter skull, as judged by the 

 teeth, is the oldest. There is practically no diflerence in size 

 between the skulls of the two sexes in G. tellonis^ the two 

 females measuring, greatest length, 70 and 69*3 mm., and 

 the male 67 mm. 



Measurciiiciits. — The three adults give the following 

 nieasurcments respectively (7. 6. 18. 2, female, type ; 

 7.6.18.3, female; and 7.(3.18.4, male): — Hind foot 

 (measured from dried skin) 67, 66, 62 mm. ; greatest length 

 of skull 69-3, 70, 67 ; zygomatic breadth 44-5, 42-6 (!),44-5 ; 

 palatal length 32, 31'8, 32'4 ; width of rostrum at prcmaxillo- 



