OF THE BEAVER AND OF SOME SQUIRRELS. 



1199 



surpassing by a little the base of the fourth. The claws on these 

 digits are shorter than on those of the fore foot. There are four 

 well-developed separated lobes constituting the plantar pad, and 

 their arrangement is quadrate, the outer and inner lying behind 



Text-figure 54. 



A. Right fore foot of Citellus (OtospermopJiihcs) heecheyi, from 



dried skin. 



B. ,, „ ,, „ Cynomys ludoviciamts. X j. 



C. „ hind ,, „ Citellus {Otospermophilus) heeclieyi, from 



dried skin. 



D. „ „ „ „ Cynomys ludovicianus. X 4. 



the others— an arrangement foreshadowed in Citellus. There 

 are no metatarsal pads, the sole being naked except for a band 

 of hair passing from the inner side of the heel forwards along the 



