1192 



MR. R. I. POCOCK ON THE EXTERNAL CHARACTERS 



the troi^ical species. An example examined in September 

 had the sole of the hind foot naked except the heel, which Avas 

 liairy, Avhereas one that died in the middle of December had the 

 sole covered with hair as far doAvn as the outer metatarsal pad. 



Text-figure 50. 



A. Riglit fore foot oi Sciurus vulgaris, mid-winter. 



C. „ fore „ ,, S. niger rufiventer , „ „ 



D. „ hind „ „ „ 



(C, D from dried skin.) 



The fore foot in the two specimens Avas quite naked beneath 

 at both dates. Again, in a skin of a specimen of the JSTorth 

 American Fox Squirrel S, (Parascmrus) niger rufiventer, Avhich 

 died at the beginning of December, all trace of the outer meta- 



