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10 ARKIV FÖR ZOOLOGI. BAND 8. N:0 23. 



Skull measurements : 



9 

 Den Chai 

 Inferior margin of foramen magnum to pre- 



maxillare = 41, o mm. 



Condylobasal length = 43,o » 



Greatest zygomatic width = 22 5 » 



Breadth of brain-case behind origin of zygo- 

 matic arch . • == 19 o » 



Occipital crest to tip of premaxillaries . . . = 47,2 

 Distance between tympanic bullse (anterior ex- 



tremity) . = 3,0 



Distance between tympanic bullae (posterior 



extremity) • . . . . = 9,5 



Deptk of skull, premaxillary surface to anterior 



extremity of nasals- = 4,2 » 



Depth of skull at highest point of parietal . = 15, o » 

 Depth of skull at middle of occipital crest to 



inferior margin of foramen magnum . . . = 12, o » 



Length of nasals = 16,o » 



Greatest breadth of nasals (at the posterior end.) = — 



9. Sciurus caiiiceps Gray. — In my collection there 

 are two specimens of this beautiful squirrel, the one shot in 

 a dense bamboo-forest near Kao Plyng, and the other 

 shot at Bång Hue Horn. The specimens, vvhich both are 

 females, were shot on the 30th of January and the 6th of 

 February, and are therefore in their bright pelage. 



This squirrel has. like many other Oriental squirrels, two 

 different seasonal pelages. The bright pelage is assumed 

 during the winter months and seems to be brightest in Ja- 

 nuary, the whole upper parfcs of the body then being of a 

 deep rufous orange colour. In this pelage this squirrel is 

 easily distinguished and quite distinct from any other of the 

 allied forms, but in the dull pelage, which is worn from about 

 March to November it much resembles Sciurus concolor 

 Blyth. which, however, is a more southern form, inhabiting 

 the Malay Peninsula, while the distributional area of Sciurus 

 caniceps Gray. is confined to Burma, Siarn and parts of the 

 Northern Malay Peninsula. Sciurus concolor Blyth. is, how- 



