74 MR. O. THOMAS ON THE MAMMALS OF [Jan. 19, 



Gr., which Dr. Anderson, in his Monograph of the genus \ keeps 

 separate from Ft. nitidus, although he described an intermediate 

 specimen seen by him in the Leyden Museum. As the two forms 

 are not geographically separate, and their skulls are quite identical, 

 I do not think there is sufficient difference in their colour to distin- 

 guish them from one another, even as varieties. 



17. Pteromys tephromelas, Giinth. 



a. c? . Klang, Salangore, 27/8/79. h. $ . Jaffaria, Johore, 

 18/3/80. 



These two specimens are of value as showing that the characters 

 of the fully adult animal are practically the same as those of the 

 young specimen described by Dr. Giinther. The colours and pro- 

 portions are almost identical, the only difference I can see being that 

 the shining black hairs on the back are somewhat longer and more 

 prominent in the adult, thus giving a less woolly appearance to 

 the whole animal. The skull of the adult also shows that the 

 species is distinguished by the very small relative size of its molars. 

 The measurements of the male specimen are as follows : — Head and 

 body 330 mm., tail 365, hairs at tip 50, hind foot 73, forearm and 

 hand 148, ear, above crown (shrunk) (c) 2.5'0. 



Skull: — Occiput to tip of nasals (c) 64, length of face 30" 7; 

 greatest breadth 42 ; nasals, length 18-6, breadth"] 1-4; interorbital 

 breadth 15-0 ; palate, length 328, breadth outside nr IG-Q, inside m' 

 8-0; diastema 16"0; palatine foramen 5*0 ; molar series (exclusive 

 of pm') 12-0 ; lower jaw, bone only, 41-5 ; to tip of incisors 45-0. 



18. SciuROPTERUs davisoni, sp. u.^ (Plate VI.) 

 a. Malacca ^ 7/77. 



General colour above much as in S. pearsoni, Gr., viz. : — dark slaty 

 grey, with the tips of the hairs bright rufous orange. Parachute 

 similar to back, its edges, especially along the supporting cartilage, 

 rich orange. Below the belly is pale orange, the orange becoming 

 deeper and richer to the edges of the parachute ; no intermixture of 

 slate except on the parachute just above the hips. Feet and ears 

 brown. Tail markedly distichous, dark brown above, rich rufous 

 orange below, the latter colour showing somewhat on the upper 

 surface between and beyond the brown hairs. 



Ears large, naked, triangular, obtusely pointed, their greatest 

 breadth nearly or quite equal to their height above the crown of the 

 head. Hind feet slender, unfringed, their soles provided with one 

 proximal and four distal well-defined foot-pads. 



The skull of the type is unfortunately very imperfect, but there 

 is enough to show that it is distinguished from that of S. pearsoni 

 by its broader interorbital space, more heavily built muzzle, broader 



' Zool. Yunn. Exp. p. 292. 



= Preliminary Diagnosis, Ann. & Mag. N. H. (5) xvii. p. 84, Jan. 1886. 

 ^ The following note is written on the back of the label of this specimen :— 

 " Thi.s species occurs also iu Tenasserim. Seen near Myawadi by Davison." 



